2. If we don’t have four air conditioners in our house, we won’t spend too much money on electricity

3. If I have Mary’s address, I can write to her

4. If Dick drive carefully, he won’t often cause accidents.

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

6. If he hurried, he wouldn’t miss the train

7. She told me that if she had had money, she would have bought me a drink

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

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

10. She said if she practiced her English, she would get any better