1. If you (give) me your address, I will write you a letter.
2. If you (not, get) tickets for the Philharmonic, we will stay at home.
3. If you (not, eat), you get hungry.
4. If it (rain), we will have to stay at home.
5. If you (drop) ice in water, it floats.
6. If you (not, call), I will be upset.
7. I will cook dinner if I (not, be) tired.
8. When we sleep, we usually (dream).
9. If my friend (be) at home, he will tell us what to do.
10. If you (not, buy) coffee, we will drink tea.
11. If he is free tomorrow, he certainly (come) to our party.
12. If you ring me up, I (tell) you a secretr.
13. If he (not, pass) his exams, he will not get a scholarship.
14. If you (not, study), you may fail the test.
15. I (buy) you a present if I have enough money.
16. When you (run) fast, you get tired.
17. If you go to the party, I’m sure you (have) a good time.
18. If we buy a car, we (not, have to) travel by train.