1. She ought to eat more fatty food and do exercises.
=> She ought not to eat less fatty food and do no exercises. (nghĩa hơi vô lí nhưng mình làm theo đề ạ)
2. What is the matter with him ?
=> What is wrong with him?
3. Long is a bad swimmer
=> Long swims badly
4. Children shouldn't stay up late
=> Children ought not to stay up late
5. You should finish your homework.
=> You ought to finish your homework.
~Xin hay nhất ạ~