Put the verbs in brackets into the correct tense.

1 If I ......... (see) Tom, I'll tell him to call you.
2 What ........... (you/do) if you win the competition?
3 If he ........... (fail) the test, he'll be in trouble.
4 She ........ (help) us if she has enough time.
5 When she .......... (come) back, she'll tell us all the details.