If it (rain) ......... tomorrow, we (not go) ......... swimming.
If it rains tomorrow, we won't go swimming.
I usually (go) ... to bed early when I (be) ... tired.
I usually go to bed early when I am tired.
If people (park) ... in the wrong place, they (have) ... to pay a fine.
If people park in the wrong place, they have to pay a fine.