You must go home now.
- Go home now.
You should put up your hands.
- Put up your hands.
You shouldn't run in the hallway.
- Don't run in the hallway.
I want to watch TV.
- Let me watch TV.
You can't swim in the river.
- Don't swim in the river.
不明白的再问哟,请及时采纳,多谢!