Поставить глагол в правильную форму 20 баллов!

If you ..................... (not study), you may
fail the test.
22 I .................. (buy) you a present if I have
enough money.
23 When you ................... (run) fast, you get
tired.
24 If you go to the party, I’m sure you ............
(have) a good time.
25 If we buy a car, we ...............................
(not have to) travel by train.
26 If you .................. (cook) dinner, I’ll wash
the dishes.
27 If I have a party, I ...................... (invite)
all my friends.
28 If it ................ (be) sunny tomorrow, we’ll
go to the park.
29 Whenever it ................... (rain), I take my
umbrella.
30 If you ...................... (not sleep) enough,
you get tired.