Put in the correct verb forms.

I ... happy if I ... my exam (be; pass).

If you ... now, you ... the train (leave; catch).

John says he ... as a taxi-driver if he ... money (work; need).

If I ... free tomorrow evening, I ... you on Friday (not be; see).

Marry ... Chinese next year if she ... time (study; have).

I ... you to the station if I ... find my car keys (drive; can).

If he ... her, he ... a happy life (marry; not have).

... you ... smoking if the doctor ... you that you must? (stop; tell).

If we ... to the boss very politely, ... he ... to us? (talk; listen).

I will be happy if I pass my exam (be; pass).

If you leave now, you will catch the train (leave; catch).

John says he will work as a taxi-driver if he needs money (work; need).

If I am not free tomorrow evening, I will see you on Friday (not be; see).

Marry will study Chinese next year if she has time (study; have).

I will drive you to the station if I can find my car keys (drive; can).

If he marries her, he will not have a happy life (marry; not have).

Will you stop smoking if the doctor tells you that you must? (stop; tell).

If we talk to the boss very politely, will he listen to us? (talk; listen).