Ex 1.
1. will have
2. looked
3. had fed
4. would understand
5. would arrive
6. would have had
7. swim
8. press
9. had asked
10. would call
Ex 2.
1. If it had been warmer, we would have gone swimming.
2. My parents would have bought this house if the man had not sold it to someone else.
3. If he had not failed his driving test, his parents would have lent him their car.
4. If my uncle had told me the way to his office, I would not have arrived so late.
5. She would have been at the airport if she had read the message carefully.
6. Lucy would not have hurt her foot if she had not dropped the old box on it.
7. If you had used a sharp knife, you would not have cut yourself.
8. If Victoria had celebrated her birthday at home, I would have brought her some flowers.
9. We would have taken the train to Edinburgh if it had run on time
10. If Max had not forgotten his schoolbag, he would have given you your USB flash drive.
Ex 3.
1. If you mix red and blue, you get purple.
2. If Arsenal wins, they’ll be top of the league.
3. If it rains, we will cancel the match.
4. If you take the first bus, you’ll get there on time.
5. If you need more helpers, I can try and get some time off work.
6. Mary might deliver your parcel if you ask her.
7. If I were 20, I would travel the world.
8. If Jim lent us his car, we could go to the party.
9. We would save £3.50 a day if we didn’t eat any lunch.
10. If burglars broke into my house, they wouldn’t find any money.
11. Would you be very angry if I failed my exam?
12. If I were you, I’d phone her straight away.
13. If you really loved me, you would buy me a diamond ring.
14. If I knew where she lived, I would go and see her.
15. If you went to bed earlier you wouldn't be so tired.