1) The chair will collapse if you (stand) on it.

2) If he (eat) all that, he will be ill.

3) If he had asked you, (you / accept)?

4) If you had left that wasp alone, it (not sting) you.

5) If I were sent to prison, (you / visit) me?

6) Someone (steal) your car if you leave it unlocked.

7) What will happen if my parachute (not open)?

8) If he knew that it was going to be boring he (not come).

9) Unless we win on Saturday our team (be) in trouble.

10) I (be) ruined if I bought her everything she asked for.