用所给词或词组的适当形式填空
1. If I _________(be)you,I would not do such a thing.
2. If he_________( follow) the doctor's advice, he would not have died.
3.If I___________( know) her well, I would tell you about her.
4. If she_________(be)more careful,she wouldn't have made these mistakes.
5. If he________(go over )his lessons yesterday,he would pass the exam now.
