Это услоные предложения, которые начинаются с Если (if). В Англ языке в условных предложения с Если, первая часть (с IF) ставится в настоящем времени, а вторая в будущем.
1. It will rain today. We shall not go for a walk.
If it rains today we shall not go for a walk
2. Don’t move. You’ll fall down.
If you move, you will fall down
3. The wind will change. There will be snow.
If the wind changes, there will be snow
4. I’ll be careful. I will not break the cups.
If I am careful, I will not break the cups
5. You have free time now. Come for a walk with me. If you have free time now, will you come for a walk with me.
6. I’ll go hiking in summer. I’ll see a lot of interesting things.
If I go hiking in summer, I will see a lot of interesting things
7. He’ll go shopping. He’ll buy some exercise-books for me. If he goes shopping, he will buy some exercise-books for me