1. I would have read the letter if I ____________________ (know) it was from you.
2. If Tony doesn’t help in the garden I ____________ (not finish) my work in time.
3. If you ____________________ (not tell ) me about Maxwell’s birthday I would forget it.
4. We __________ (catch) the train earlier if Mary had found her purse.
5. If Susan __________ (learn) the poem she would have known the answer.
6. If it ________ (be) too hot we will stop and get a cold drink.
7. If it ________ (not rain) today I would stay it home.
8. If the Professor spoke clearly we ___________ (understand) him better.
9. If you go on talking like that we ___________ (throw) you out.
10. If Sasha ___________ (go) home now he would meet his own brother.
11. If it rained , the streets ______ (be) wet.
12. If I _______ (not tell) Jim the address he wouldn’t have found you.
13. The bird __________ (die) if you had caught it.
14. What _________ (you, do) if you won the lottery?
15. If the weather ________ (not change) we will reach the top of the mountain.