Объяснение:
1)If we will find the power in ourselves, we will win
2)We'll sleep unless we do not set the alarm
3)If he is drunk, he should not drive
4)If you are already 21, you can buy beer
5)If I were rich, I would buy a yacht
6)If there are necessary materials, the work is going on
7)It becomes too hot when the sun city
8)If we consider the motion of objects within the Earth, we use Newton's law of gravitation