Ex1

1. had had - would have bought

2. would have bought - lent

3. would have seen - had gone

4. would have gone - hadn't been

5. hadn't been - would have bought

6. would have been - had returned

7. would have gone - hadn't rained

8. wouldn't have come - hadn't invited

EX2.

1. If she hadn't got married at such an early age, she would be at university now

2. If I had known Alice's address, I could have written to her

3. If we had had a map, we wouldn't have got lost

4. If the farmers had had enough rain, they could have grown rice

5. If his friends hadn't been late, they wouldn't have missed the train

6. If you had told me we were going to after the ..., I would have brought extra money

7. If it hadn't rained, we would have gone to the concert

8. If that motorbike hadn't been expensive, I would have bought it

9. If he had done his homework, he wouldn't have got low marks

10. If we had had time, we would have visited the museum