Ответ:
1.If Peter comes to my place, we will go to play in the yard.
2.If Peter doesn't come to my place, I will watch TV.
3.If Frank's parents have their holidays in summer, they will go to the seaside.
4.If they have have their holidays in winter, they will stay at home.
5.If the fog thickens, Harold will put the tent up for the night.
6.When I finish my work, I will go to the cinema.
7.We will buy this book as soon as our mother gives us some money.
8.When we come to your place you will show us your present.
9.I will return you your ring when you ask me.
10.I will wait for my friend until he comes from the shop.
11.My father starts writing before the sun will rise.
12.As soon as you finish your study I will present you with a new flat.