Ответ:
1 if it rains, i won't go to the football match today.
2 will you help me if you are not too busy?
3 Tomas would feel better, if he slept a bit.
4 if the weather were better, the children would play in the garden.
5 if they didn't get ab umbrella, they would (be) get wet.
6 if temperature is zero, water will freeze.
7 she will not walk to school, if she has a bike.
8 if you mix blue and yellow, you get green.
9 if the weather were better, the children would play in the garden.