1: Their teacher will sad if they don't pass the exam

2: If you don't say sorry, they won't forgive you
3. You can not buy this watch if you have enough money
4.If he wants to pass the exam, he should study hard
5: If you wanted to be healthy, you shouldn't continue smoking
6.You will stay at home if it rains tomorrow
8. We won't invite her again if she doesn't come
9.I will call you a ride home if it rains tomorrow
10: The plants may not need fertilizer if the soil is rich
11.If he comes back soon, we will have lunch together
12.If I win the first prize contest, I will take you a trip
Chúc bạn học tốt.