`1`. You shouldn't point to anything with your foot.

`2`. You shouldn't arrive early if you're invited to someone's home.

`3`. You shouldn't touch anyone except a child on the head.

`4`. You should take off your shoes at the entrance to all homes.

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`1`. S + should + V-inf: nên làm gì

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

`11.` You shouldn't point to anything with your foot.

`12.` You shouldn't arrive early if you're invited..

`13.` You shouldn't touch anyone exept a child on the head.

`14.` You should take off your shoes at the entrance to all homes.

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Never : không bao giờ = câu phủ định

Should/Shouldn't : nên/không nên làm gì

Should + V-inf 

` tt (@ymmww:>) `