1. Should/ shouldn't
ex:
`1`. You should go to bed early
`2`. You should go to the doctor when you are ill
`3`. You shouldn't climb the tree
2. Hỏi về sức khỏe
ex:
`1`. What is the matter with you?
→ I am sick
`2`. What is the matter with your friend?
→ She has a backache
`3`. What is the matter with Phong?
→ He has a pain in his stomach