Conditional Sentences Exercises — 150 Powerful Real-World Practice Questions for Every Learner

Fill in the blank, error correction, sentence transformation, modal substitution, and IELTS Writing practice — complete answer key included for every exercise

How to Use These Exercises

These 150 conditional sentences exercises are organised across eight blocks — one block per conditional type, plus dedicated blocks for error correction, sentence transformation, and IELTS Writing Task 2 practice. Each block has a clear instruction, numbered questions, and a full answer key immediately below.

Work through the blocks in order if you are building your conditional grammar from scratch. If you are targeting a specific conditional type or a specific skill — fill-in-the-blank, error correction, or IELTS practice — go directly to that block. Every exercise in this guide is drawn from real-world contexts: science, business, climate, career, history, and everyday life.

Zero
Q1–20

First
Q21–40

Second
Q41–60

Third
Q61–80

Mixed
Q81–100

Errors
Q101–120

Transform
Q121–135

IELTS
Q136–150

Before You Begin

Each block covers a different conditional type in depth. If you have not yet read the full guide for a particular type, the links below will take you directly there:

Part 2: Zero Conditional  |  Part 3: First Conditional  |  Part 4: Second Conditional  |  Part 5: Third Conditional  |  Part 6: Mixed Conditionals  |  Part 7: Errors & Fixes

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Block 1 — Zero Conditional Exercises (Questions 1–20)

Exercise 1A — Fill in the Blank

Q1–10

Complete each sentence using the correct form of the verb in brackets. Both clauses must use simple present tense.

• 1.If you(heat) iron, it(expand).
• 2.When the battery(run) out, the device(shut) down automatically.
• 3.If employees(not meet) their targets, the performance review(flag) the gap.
• 4.Plants(wither) if they(not receive) adequate sunlight.
• 5.If you(mix) vinegar and baking soda, the reaction(produce) carbon dioxide.
• 6.Whenever demand(exceed) supply, prices(rise).
• 7.If the server(not detect) a signal, it(switch) to offline mode.
• 8.When I(drink) coffee late at night, I(not sleep) well.
• 9.If the fire alarm(sound), everyone(evacuate) the building immediately.
• 10.If ocean temperatures(rise), coral reefs(bleach).

1. heat / expands
2. runs / shuts
3. do not meet / flags
4. wither / do not receive (reversed clause — no comma needed)
5. mix / produces
6. exceeds / rise
7. does not detect / switches
8. drink / do not sleep
9. sounds / evacuate (imperative result clause)
10. rise / bleach

Exercise 1B — Error Correction

Q11–20

Each sentence below contains one error. Identify and correct it. Write the full corrected sentence.

• 11.If you will heat metal, it expands.
• 12.If I am skipping breakfast, I would feel hungry.
• 13.Unless you don’t water the plant regularly, it dies.
• 14.When you mix oil and water, they will not combine.
• 15.If the pressure is building up, the valve opens.
• 16.If you are exposing food to heat, bacteria grows faster.
• 17.When employees will not meet deadlines, the project falls behind.
• 18.If I don’t get enough sleep, I would feel exhausted the next day.
• 19.If the app will crash, restart your device.
• 20.Unless you don’t submit the form, the system rejects it.

11. If you heat metal, it expands. (remove “will” from if-clause)
12. If I skip breakfast, I feel hungry. (simple present in both clauses)
13. Unless you water the plant regularly, it dies. (“unless” = “if not” — remove “don’t”)
14. When you mix oil and water, they do not combine. (remove “will”)
15. If the pressure builds up, the valve opens. (simple present — not present continuous)
16. If you expose food to heat, bacteria grows faster. (simple present — not present continuous)
17. When employees do not meet deadlines, the project falls behind. (remove “will”)
18. If I don’t get enough sleep, I feel exhausted the next day. (simple present — not “would”)
19. If the app crashes, restart your device. (remove “will” from if-clause)
20. Unless you submit the form, the system rejects it. (remove “don’t”)

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Block 2 — First Conditional Exercises (Questions 21–40)

Exercise 2A — Fill in the Blank

Q21–30

Complete each sentence using the correct form of the verb in brackets. Use simple present in the if-clause and will/won’t + base verb in the result clause.

• 21.If she(pass) the interview, she(start) the role next month.
• 22.Unless the funding(be) confirmed this week, the project(not proceed).
• 23.If the government(reduce) taxes on small businesses, employment(rise).
• 24.Provided that both parties(agree) to the terms, the contract(be) signed by Friday.
• 25.If you(not submit) the application by noon, the system(not accept) it.
• 26.As long as the weather(hold), the outdoor ceremony(go) ahead as planned.
• 27.If the client(request) a revision, the team(have) 48 hours to respond.
• 28.Once the report(be) finalised, we(distribute) it to all stakeholders.
• 29.If she(not rest) today, she(not recover) in time for the presentation.
• 30.Should you(require) further information, please(contact) our support team.

21. passes / will start
22. is / will not proceed
23. reduces / will rise
24. agree / will be
25. do not submit / will not accept
26. holds / will go
27. requests / will have
28. is / will distribute
29. does not rest / will not recover
30. require / contact (inverted conditional — imperative result clause)

Exercise 2B — Modal Substitution

Q31–40

Rewrite each sentence by replacing “will” with the modal in brackets. Note how the meaning changes. The if-clause stays the same.

• 31.If the policy is implemented, emissions will fall. → [could]
• 32.If she applies for the grant, she will receive funding. → [might]
• 33.If the symptoms persist, you will see a doctor. → [should]
• 34.If you complete the module, you will take the assessment. → [can]
• 35.If he joins the programme, he will develop new skills. → [could]
• 36.If the deal closes this quarter, revenue will increase. → [may]
• 37.If you want to lead the project, you will demonstrate reliability. → [must]
• 38.If the train is delayed, she will miss her connection. → [might]
• 39.If the company expands, more roles will be created. → [could]
• 40.If the temperature drops overnight, the pipes will freeze. → [may]

31. If the policy is implemented, emissions could fall. (possible, not certain)
32. If she applies for the grant, she might receive funding. (uncertain outcome)
33. If the symptoms persist, you should see a doctor. (advice)
34. If you complete the module, you can take the assessment. (permission/ability)
35. If he joins the programme, he could develop new skills. (potential)
36. If the deal closes this quarter, revenue may increase. (less certain than “will”)
37. If you want to lead the project, you must demonstrate reliability. (obligation)
38. If the train is delayed, she might miss her connection. (uncertain possibility)
39. If the company expands, more roles could be created. (potential)
40. If the temperature drops overnight, the pipes may freeze. (possibility)

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Block 3 — Second Conditional Exercises (Questions 41–60)

Exercise 3A — Fill in the Blank

Q41–50

Complete each sentence using the correct form of the verb in brackets. Use past simple in the if-clause and would + base verb in the result clause. Use “were” (not “was”) throughout.

• 41.If I(speak) Japanese fluently, I(apply) for the Tokyo posting immediately.
• 42.If she(be) more decisive, she(accept) the offer without hesitation.
• 43.If the government(invest) more in public transport, commuters(benefit) enormously.
• 44.If I(be) in your position, I(request) a meeting with senior management.
• 45.If the company(reduce) its prices, it(attract) a much younger demographic.
• 46.It(be) helpful if you(could share) the updated figures with the team before Thursday.
• 47.If urban areas(reduce) car dependency, air quality(improve) measurably.
• 48.If he(not travel) so frequently, he(have) more time to develop his leadership skills.
• 49.If I(have) more energy in the evenings, I(exercise) consistently.
• 50.If the board(approve) the expansion plan, we(be) able to enter three new markets by next year.

41. spoke / would apply
42. were / would accept
43. invested / would benefit
44. were / would request
45. reduced / would attract
46. would be / could share (polite request form)
47. reduced / would improve
48. did not travel / would have
49. had / would exercise
50. approved / would be

Exercise 3B — Were vs Was and Error Correction

Q51–60

Each sentence contains one error — either incorrect use of “was/were,” wrong modal, or “would” in the if-clause. Identify and correct.

• 51.If I would have more confidence, I would speak up more.
• 52.If she was more organised, she would meet every deadline.
• 53.If I were you, I will address the issue before it escalates.
• 54.If the policy would change, businesses would adapt quickly.
• 55.If he was taller, he would be a professional basketball player.
• 56.If the company invested in better tools, productivity will improve.
• 57.If I had a better memory, I don’t forget people’s names.
• 58.If she would reduce her workload, she would feel less stressed.
• 59.If the government was more transparent, public trust would increase.
• 60.If I were in charge, I would have changed the entire approach.

51. If I had more confidence, I would speak up more. (remove “would”)
52. If she were more organised, she would meet every deadline. (“were” in formal writing)
53. If I were you, I would address the issue before it escalates. (“would” not “will”)
54. If the policy changed, businesses would adapt quickly. (past simple — not “would”)
55. If he were taller, he would be a professional basketball player. (“were” not “was”)
56. If the company invested in better tools, productivity would improve. (“would” not “will”)
57. If I had a better memory, I wouldn’t forget people’s names. (“wouldn’t” not “don’t”)
58. If she reduced her workload, she would feel less stressed. (past simple — not “would reduce”)
59. If the government were more transparent, public trust would increase. (“were” not “was”)
60. If I were in charge, I would change the entire approach. (Second Conditional — not mixed; remove “have”)

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Block 4 — Third Conditional Exercises (Questions 61–80)

Exercise 4A — Fill in the Blank

Q61–70

Complete each sentence using the correct form. Use past perfect in the if-clause and would have / could have / might have + past participle in the result clause.

• 61.If I(leave) earlier, I(catch) the last train.
• 62.If the company(invest) in training earlier, it(retain) more of its senior staff.
• 63.If she(not resign) so abruptly, she(receive) a full severance package.
• 64.If the government(act) on the early warnings, the crisis(be) far less severe.
• 65.If I(know) about the event, I certainly(attend).
• 66.the team(communicate) better, the project(not fail). [inverted form]
• 67.If the medicine(be administered) earlier, the patient(recover) more quickly. [passive if-clause]
• 68.If she(take) the doctor’s advice, she(avoid) the complications that followed.
• 69.If I(check) the contract more carefully, I(not sign) that clause.
• 70.If the peace talks(succeed) in 2015, the region(follow) a very different path.

61. had left / would have caught
62. had invested / would have retained
63. had not resigned / would have received
64. had acted / would have been
65. had known / would have attended
66. Had the team communicated better, the project would not have failed.
67. had been administered / would have recovered / might have recovered
68. had taken / would have avoided / could have avoided
69. had checked / would not have signed
70. had succeeded / would have followed / might have followed

Exercise 4B — Would Have / Could Have / Might Have

Q71–80

Choose the most appropriate modal for the result clause — would have, could have, or might have — based on the meaning given in brackets.

• 71.If she had applied in time, she ________ got the scholarship. [certain result]
• 72.If the treatment had begun earlier, the patient ________ survived. [uncertain — hard to say]
• 73.If I had studied medicine, I ________ become a specialist by now. [ability was there]
• 74.If the negotiations had continued, both sides ________ reached an agreement. [possible but not guaranteed]
• 75.If he had trained harder, he ________ won the championship. [certainty implied]
• 76.If the data had been collected more carefully, the findings ________ been more reliable. [uncertain improvement]
• 77.If I had left five minutes earlier, I ________ avoided the entire traffic jam. [clear ability to avoid]
• 78.If the policy had been stricter, pollution levels ________ fallen — though other factors were also involved. [uncertain, qualified]
• 79.If she had spoken up in the meeting, the decision ________ gone differently. [possible but uncertain]
• 80.If I had booked earlier, I ________ saved a significant amount on the flights. [ability + certain saving]

71. would have — certain result
72. might have — uncertain outcome
73. could have — ability existed
74. might have — possible but not guaranteed
75. would have / could have — both acceptable; “would have” implies greater certainty
76. might have — uncertain improvement
77. could have — ability to avoid was clear
78. might have — qualified, uncertain
79. might have — possible but uncertain
80. could have — ability and certainty of saving

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Block 5 — Mixed Conditional Exercises (Questions 81–100)

Exercise 5A — Type A Mixed Conditional (Past → Present)

Q81–90

Complete each Type A mixed conditional. Use past perfect in the if-clause and would + base verb (or would be + V-ing) in the result clause. Look for “now,” “today,” or “currently” as signals.

• 81.If I(study) engineering, I(work) in the infrastructure sector now.
• 82.If she(accept) the scholarship offer, she(live) abroad at this point.
• 83.If the company(invest) in renewable energy a decade ago, it(be) in a far stronger position today.
• 84.If I(not take) that detour last year, I(not know) about this opportunity now.
• 85.If the government(implement) those reforms in 2015, the economy(perform) much better currently.
• 86.the peace talks(succeed), the region(be) far more stable today. [inverted form]
• 87.If I(start) saving in my twenties, I(be) in a very different financial position now.
• 88.If she(pursue) an MBA earlier, she(lead) a senior team at this stage of her career.
• 89.If the policy(be introduced) sooner, the situation(look) very different today. [passive if-clause]
• 90.If we(leave) on time this morning, we(sit) on the beach right now.

81. had studied / would be working (or: would work)
82. had accepted / would be living (or: would live)
83. had invested / would be
84. had not taken / would not know
85. had implemented / would be performing (or: would perform)
86. Had the peace talks succeeded, the region would be far more stable today.
87. had started / would be
88. had pursued / would be leading (or: would lead)
89. had been introduced / would look
90. had left / would be sitting

Exercise 5B — Type B Mixed Conditional (Present → Past)

Q91–100

Complete each Type B mixed conditional. Use past simple or “were” in the if-clause (present unreal quality) and would have + past participle in the result clause.

• 91.If she(be) more patient by nature, she(handle) that conversation very differently.
• 92.If I(speak) better French, I(negotiate) the deal myself last month.
• 93.If he(be) more detail-oriented, he(catch) the error before it went to the client.
• 94.If the city(have) better public transport, I(take) the train to yesterday’s conference.
• 95.If the organisation(be) more transparent, the crisis(be managed) far better when it first emerged. [passive result]
• 96.If I(be) braver, I(speak) up in that meeting last week.
• 97.If the government(be) more committed to sustainability, it(invest) in renewables years ago.
• 98.If she(not be) so risk-averse, she(take) the funding when it was offered.
• 99.the regulatory framework stronger, the violations(not go) undetected for so long. [inverted form]
• 100.If I(be) more disciplined, I(complete) my PhD on schedule.

91. were / would have handled
92. spoke / would have negotiated
93. were / would have caught
94. had / would have taken
95. were / would have been managed
96. were / would have spoken
97. were / would have invested
98. were not / would have taken
99. Were the regulatory framework stronger, the violations would not have gone undetected for so long.
100. were / would have completed

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Block 6 — Error Correction Across All Types (Questions 101–120)

Exercise 6 — Mixed Error Correction

Q101–120

Each sentence contains one error. Identify the error, name the conditional type, and write the corrected sentence.

• 101.If it will snow tomorrow, the school will close. [First Conditional]
• 102.If I would win the lottery, I would donate half to charity. [Second Conditional]
• 103.If you heat ice, it will melt. [Zero Conditional]
• 104.If she would have studied harder, she would have passed. [Third Conditional]
• 105.If I had taken that job, I would have been living in London now. [Mixed Type A]
• 106.Unless you don’t complete the course, you won’t receive the certificate. [First Conditional]
• 107.If I was in your position, I would resign immediately. [Second Conditional — formal]
• 108.If they had tried harder, they would win. [Third Conditional]
• 109.If I had more experience, I would have applied for that role last year. [Mixed Type B — correct form needed]
• 110.If the government had acted sooner, the situation would be better. Correct? [Identify type]
• 111.If you will submit the form early, you will get a faster response. [First Conditional]
• 112.If I knew about the concert, I would have bought tickets. [Third Conditional]
• 113.If she was more confident, she would perform better in interviews. [Second Conditional — formal]
• 114.If I would have left earlier, I would have caught the train. [Third Conditional]
• 115.Provided that she will agree, we will proceed with the partnership. [First Conditional]
• 116.If he had been more experienced, he would have a stronger portfolio now. Correct? [Identify type]
• 117.If the results were better, we will expand the programme. [First/Second mix error]
• 118.Had I knew the truth earlier, I would have acted very differently. [Third — inverted]
• 119.If I had studied medicine, I would have been a doctor now. [Mixed Type A]
• 120.If they don’t invest now, they would regret it later. [First Conditional]

101. If it snows tomorrow, the school will close. (remove “will” from if-clause)
102. If I won the lottery, I would donate half to charity. (past simple — remove “would”)
103. If you heat ice, it melts. (universal truth — simple present, not “will melt”)
104. If she had studied harder, she would have passed. (past perfect — remove “would”)
105. If I had taken that job, I would be living in London now. (“would be living” not “would have been living” — present consequence)
106. Unless you complete the course, you won’t receive the certificate. (remove “don’t”)
107. If I were in your position, I would resign immediately. (“were” not “was” in formal writing)
108. If they had tried harder, they would have won. (“would have won” not “would win”)
109. If I were more experienced, I would have applied for that role last year. (Type B — present quality → past result; “were” not “had”)
110. Correct — this is a Type A Mixed Conditional. Past condition → present result (“would be better” is correct)
111. If you submit the form early, you will get a faster response. (remove “will” from if-clause)
112. If I had known about the concert, I would have bought tickets. (past perfect — “had known” not “knew”)
113. If she were more confident, she would perform better in interviews. (“were” not “was”)
114. If I had left earlier, I would have caught the train. (past perfect — remove “would have”)
115. Provided that she agrees, we will proceed with the partnership. (simple present — remove “will”)
116. Correct — this is a Type A Mixed Conditional. “had been” (past) → “would have” (present state expressed as “a stronger portfolio now”)
117. If the results are better, we will expand the programme. (First Conditional — if-clause needs simple present)
118. Had I known the truth earlier, I would have acted very differently. (past participle “known” — not “knew”)
119. If I had studied medicine, I would be a doctor now. (“would be” not “would have been” — present consequence)
120. If they don’t invest now, they will regret it later. (“will” not “would” — real future consequence)

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Block 7 — Sentence Transformation (Questions 121–135)

Exercise 7 — Sentence Transformation

Q121–135

Rewrite each sentence as instructed. Keep the meaning as close as possible while producing the required conditional type or form.

• 121.“I don’t have a car, so I can’t drive you.” → Rewrite as a Second Conditional.
• 122.“She didn’t study, so she didn’t pass.” → Rewrite as a Third Conditional.
• 123.“If it rains, I will take an umbrella.” → Rewrite using “should” in the result clause.
• 124.“If you heat water to 100°C, it boils.” → Rewrite using “when.”
• 125.“If I had taken that job, I would be in London now.” → Rewrite as inverted form.
• 126.“If she doesn’t submit by Friday, she won’t be considered.” → Rewrite using “unless.”
• 127.“He didn’t invest early. That is why he is not wealthy now.” → Rewrite as a Type A Mixed Conditional.
• 128.“She is not patient. That is why she didn’t handle the situation well.” → Rewrite as a Type B Mixed Conditional.
• 129.“If the policy is adopted, it could reduce costs.” → Rewrite using “provided that.”
• 130.“If you require assistance, please contact us.” → Rewrite as an inverted First Conditional.
• 131.“The company didn’t act. The damage was not contained.” → Rewrite as a Third Conditional passive.
• 132.“I don’t speak Arabic, so I couldn’t communicate during the trip.” → Rewrite as a Type B Mixed Conditional.
• 133.“If she had more confidence, she would apply.” → Rewrite: make it clear she now decides to change — use First Conditional.
• 134.“If governments invest in education, inequality falls.” → Rewrite as Second Conditional (treat as hypothetical policy suggestion).
• 135.“The reforms were not introduced. The situation is worse today.” → Rewrite as a Type A Mixed Conditional using inverted form.

121. If I had a car, I would drive you.
122. If she had studied, she would have passed.
123. If it rains, I should take an umbrella.
124. When you heat water to 100°C, it boils.
125. Had I taken that job, I would be in London now.
126. Unless she submits by Friday, she won’t be considered.
127. If he had invested early, he would be wealthy now.
128. If she were more patient, she would have handled the situation better.
129. Provided that the policy is adopted, it could reduce costs.
130. Should you require assistance, please contact us.
131. If the company had acted, the damage would have been contained.
132. If I spoke Arabic, I would have been able to communicate during the trip.
133. If she builds her confidence, she will apply. (First Conditional — real future action)
134. If governments invested in education, inequality would fall.
135. Had the reforms been introduced, the situation would be better today.

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Block 8 — IELTS Writing Task 2 Practice (Questions 136–150)

Exercise 8 — IELTS Writing Task 2 Sentence Construction

Q136–150

Write a complete, grammatically accurate conditional sentence for each prompt. The conditional type and topic are given. Aim for sentences that would be appropriate in IELTS Writing Task 2 body paragraphs. Model answers are provided — your sentence may differ in vocabulary but must be grammatically correct.

• 136.[First Conditional] Topic: Renewable energy investment → future emissions
• 137.[First Conditional — “could”] Topic: Government education funding → inequality
• 138.[Second Conditional] Topic: Universal basic income → work incentive
• 139.[Second Conditional — “were to”] Topic: Technology companies + data regulation
• 140.[Second Conditional — polite request] Topic: Examiner asking for essay evidence
• 141.[Third Conditional] Topic: Early climate agreements + current temperature levels
• 142.[Third Conditional — “might have”] Topic: Early pandemic response + death toll
• 143.[Third Conditional — inverted] Topic: Financial reforms after 2008 + global stability
• 144.[Mixed Type A] Topic: Post-war reconstruction investment + current regional stability
• 145.[Mixed Type A — passive] Topic: Urban planning policy + current housing crisis
• 146.[Mixed Type B] Topic: Government → more accountable → past decision
• 147.[Mixed Type B — inverted] Topic: International cooperation on climate → past emissions
• 148.[Zero Conditional — academic register] Topic: Poverty + access to education
• 149.[First + Second in same paragraph] Topic: Artificial intelligence + employment — write two sentences, one First and one Second Conditional on the same topic.
• 150.[Third + Mixed Type A in same paragraph] Topic: Colonial-era resource extraction + present economic development — write two sentences, one Third and one Type A Mixed Conditional, to form a coherent analytical paragraph.

136. If governments increase investment in renewable energy, carbon emissions will fall significantly within the next decade.
137. If governments allocate more funding to early childhood education, inequality could be reduced across generations.
138. If a universal basic income were introduced, some argue that the incentive to work would diminish — though the evidence from pilot programmes suggests otherwise.
139. If technology companies were to face stricter data regulations, the current culture of unchecked data collection would be fundamentally disrupted.
140. It would be helpful if this argument were supported by specific statistical evidence drawn from recent research.
141. If the early climate agreements of the 1990s had been implemented in full, global temperatures would have risen at a considerably slower rate.
142. If international health bodies had responded more swiftly in the earliest weeks of the pandemic, the eventual death toll might have been significantly lower.
143. Had more decisive financial reforms been implemented after the 2008 crisis, the structural vulnerabilities in the global banking system would have been reduced substantially.
144. If post-war reconstruction had been better resourced and more equitably distributed, many conflict-affected regions would be in a far more stable economic condition today.
145. If urban planning policies had been designed with long-term affordability in mind, the current housing crisis would not be as acute as it is in most major cities today.
146. If the government were more accountable to its citizens, it would have reversed the decision when public opposition first emerged.
147. Were the international community more united on climate action, collective emissions targets would have been met far more consistently over the past two decades.
148. If poverty is not addressed alongside education reform, improvements in access alone will not produce meaningful long-term outcomes.
149. First Conditional: If AI continues to automate routine tasks, millions of low-skilled workers will need to retrain for roles that require human judgement. Second Conditional: If AI were to replace most forms of employment, the social contract between productivity and income would require complete reimagining.
150. Third Conditional: If colonial powers had not extracted resources at scale for over two centuries, many currently developing nations would have retained the capital needed to industrialise independently. Type A Mixed: If those resources had remained within the economies that produced them, the development gap between former colonies and industrialised nations would be considerably narrower today.

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Points to Remember — Conditional Sentences Exercises

1. Zero Conditional: Simple present in both clauses. No “will,” no “would.” Use for universal truths, habits, scientific facts, and instructions.
2. First Conditional: Simple present in if-clause. Will + base verb in result clause. For real, genuinely possible future situations. “Will” can be replaced with could, might, may, should, must, or can — each changes the meaning.
3. Second Conditional: Past simple in if-clause. Would + base verb in result clause. Use “were” (not “was”) for all persons in formal writing. For hypothetical, unlikely, or imaginary present situations.
4. Third Conditional: Past perfect in if-clause. Would have + past participle in result clause. For unreal, permanently closed past situations. “Would have” can be replaced with could have, might have, or may have.
5. Mixed Type A: Past perfect in if-clause + would + base verb in result clause. For past conditions with present consequences. Look for “now,” “today,” or “currently” as signals.
6. Mixed Type B: Past simple / were in if-clause + would have + past participle in result clause. For present qualities that explain past outcomes.
7. “Will,” “would,” and “would have” never belong in any if-clause — across all five conditional types, in all registers, without exception.
8. “Unless” means “if not” — never add “don’t,” “not,” or any other negative after it.

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The Complete Conditionals 360° Series — All Eight Parts

Part	Title	Focus
Part 1	What Are Conditional Sentences?	Introduction — all five types, alternate names, IELTS band map
Part 2	Zero Conditional Sentences	Universal truths, habits, imperative form, if vs when
Part 3	First Conditional Sentences	Real future, modal flexibility, connectors, inverted form
Part 4	Second Conditional Sentences	Hypothetical present, were vs was, were to, six use cases
Part 5	Third Conditional Sentences	Unreal past, five registers, second vs third pairs, modal range
Part 6	Mixed Conditionals	Type A and B, passive forms, question forms, IELTS band map
Part 7	Conditional Sentence Errors	30 errors across all types — identified, corrected, damage-rated
Part 8	Conditional Sentences Exercises	150 practice questions — fill-in, error correction, transformation, IELTS