`8`. We shouldn't talk when the teacher is teaching.

`9`. You shouldn't eat while you're walking in the public.

`10`. You shouldn't eat with your left hand.

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`1`. S + should + V-inf: nên làm gì

`2`. S + shouldn't + V-inf: không nên làm gì

8, We shouldn't talk when the teacher is teaching.

9, You shouldn't eat while you're walking in the public.

10, You shouldn't eat with your left hand.

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- Câu mệnh lệnh ( - ) Don't + V(inf)!, nói về điều không được phép làm 

- Dùng cấu trúc khuyên nhủ thay thế:

( - ) S + should (not)/ shouldn't + V(inf): (không) nên làm gì