Sure! Here are the rewritten sentences:

27. If you took better care of the car, it wouldn't break down so often.

28. If he hadn't been so bad-tempered, his wife might not have left him soon after they got married.

29. If you lie to your boss, you'll be fired immediately.

30. She would be at university now if she hadn't gotten married at such a young age.

25. You would be able to do this exercise if your English were good.

26. You should bring your raincoat, or you will get wet.

27. If a detective hadn't recognized him, Dick would still be out of prison.

28. If Mai had followed the doctor's orders, she wouldn't be sick now.

29. If we had had enough rain, we could have grown rice.

30. If the minister hadn't insisted, the ban on hunting would not have been imposed.

31. If Jim's speed hadn't been greater, then all that stood between John and the gold medal would have been nothing.

32. However, Richard only took over the family business because his father decided to retire early.