2, If we didn’t have four air conditioners in our house, we wouldn’t have spent too much money on electricity.

3, If I had Mary’s address, I could write to her.

4, If Dick drove carefully, he wouldn’t cause accidents.

5, If we didn’t waste a lot of money on unnecessary things, we could give much help to the poor.

6, If he had hurried, he wouldn’t have missed the train.

7, She told me that if she had had any money, she would buy me a drink.

8, He said that if he caught the plane, he would be home by five.

9, Tom said that if he had had his mobile the previous day, he could have contacted me.

10, She said that if she didn’t practice her English, he wouldn’t get any better.

V

1, has lived

2, was studying

3, would be

4, doesn’t go

5, wouldn’t work

6, opening

7, to use

8, amusing

9, have taken

10, asks