Conditional Sentence Exercise & Practice with Explanation

1. Water boils ______ you heat it to 100 degree Centigrade.
Correct Answer: if
Explanation: Zero Conditional (If + present simple + present simple) is used for Universal Truth / Scientific Truth or Habitual Truth.
2. If he wants to play the violin, I _______ the piano for him.
Correct Answer: shall play
Explanation: This is an example of 1 st Conditional ( If + Present + Future).
3. If I had much money, I ______.
Correct Answer: would help the distressed people
Explanation: As per rules of 2 nd conditional: If + Past Indefinite (1 st clause), + Subject + would /could + present form of verb + Object (2 nd clause).
4. “If the driver had been more careful, the accident _________ occurred.
Correct Answer: might not have
Explanation: Third Conditional: If + Past Perfect form of verb + would/could/might + Past Participle form of verb
5. Had I known in advance, I ______ enough money.
Correct Answer: would have taken
Explanation: Had + sub+ past participle form of verb + sub+ would have/ could have/ might have + past participle form of verb
6. If I had known you were coming, ________.
Correct Answer: I would have gone to the station
Explanation: Third Conditional: If + Past Perfect form of verb + would have/ could have / might have + Past Participle form of verb
7. He ______ to see us if he had been able to.
Correct Answer: would have come
Explanation: Sub + would have/could have / might have + past participle form of verb+ if + sub + past perfect
8. Had I been a king, I _________.
Correct Answer: would have helped the poor
Explanation: Had + sub+ past participle form of verb + sub+ would have/ could have/ might have + past participle form of verb
9. Choose the correct sentence:
Correct Answer: If he works hard, he will succeed.
Explanation: Structure of 1 st Conditional: If + Present tense + Future Indefinite Tense
10. If I had a typewriter, ______.
Correct Answer: I would type myself
Explanation: 2 nd conditional: If + Past Indefinite (1 st clause), + Subject + would /could + present form of verb + Object (2 nd clause).
11. Had I the wings of a bird, _________
Correct Answer: I could fly in the sky.
Explanation: 2 nd Conditional: Had + subject + object + could/would/might + present form of verb
12. I we had a boat, we ________ the river.
Correct Answer: would cross
Explanation: Rules for 2 nd conditional: If + Past Indefinite (1 st clause), + Subject + would /could + present form of verb + Object (2 nd clause)
13. If she ______ her identity card, she ______ in trouble.
Correct Answer: loses, will be
Explanation: 1 st Conditional: If + Present tense + Future Indefinite Tense
14. Choose the correct sentence:
Correct Answer: If I find a bag in the street, I take it to the police.
Explanation: Zero Conditional (If + present simple + present simple) is used for Universal Truth / Scientific Truth or Habitual Truth.
15. What would have happened if _____?
Correct Answer: the bridge had been broken
Explanation: 3 rd Conditional (Question) : Relative Pronouns + would/might/could have + Past participle form of verb + if + sub + Past Perfect Tense
16. Choose the correct sentence:
Correct Answer: If I had a camera, I would take some photographs.
Explanation: If I had a camera, I would take some photographs.
17. You might have had a windfall _____________.
Correct Answer: if you had had an opportunity
Explanation: Structure for 3 rd Conditional: Sub + would have/could have / might have + past participle form of verb+ if + sub + past perfect tense
18. If you had seen the accident, you _________ so fast now.
Correct Answer: won’t be driving
Explanation: According to the meaning of the sentence, 3rd Conditional rules will not be applied. Rather simple future tense will be used for the future possibility of the sentence.
19. If you don’t want to miss the train, you ________ finish your tea soon.
Correct Answer: had better
Explanation: For future suggestion: If + any tense + had better + present form of verb
20. __________ more help, I could call my neighbor.
Correct Answer: Should I need
Explanation: For very minimal amount of possibility, Should I need = If I should need structure is used.
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