Second vs Third Conditional worksheet

1. 1.
   If I his address, I'd send him a card. But I don't.a) knewb) had known
2. 2.
   If we had left earlier, we the train.a) would catchb) would have caught
3. 3.
   If she more careful, she wouldn't have had the accident.a) had beenb) were
4. 4.
   If I were taller, I reach the shelf.a) couldb) could have
5. 5.
   If you me, I would have helped.a) askedb) had asked

1. 1.
   If I had time yesterday, I would help you.
2. 2.
   If I would have known, I would have come.
3. 3.
   If I had known, I would help.

Write two sentences about your own life: one with Second conditional and one with Third conditional. Then explain the difference to a partner.

1. 1.a) knew Imagined now: second conditional.
2. 2.b) would have caught Imagined past: third conditional.
3. 3.a) had been A past event: if + Past Perfect.
4. 4.a) could Imagined now: could + base verb.
5. 5.b) had asked Imagined past: if + Past Perfect.

1. 1.If I had had time yesterday, I would have helped you. Yesterday is the past, so both parts take the third conditional.
2. 2.If I had known, I would have come. Would goes only in the result.
3. 3.If I had known, I would have helped. A past result takes would have + participle.

Answers will vary. Check that each sentence follows the rule on page 1, or paste them into Clarigram to have them checked.