1.Why I shouldn't climb that tree ?

2. Is Nga going to run down the stairs ?

3. Dont play with a cat because it may scratch your face

4. Don't touch the stove ! You may get a burn.

1. a toothache

2.What's wrong with your mother

3 .-Because I was tired, I went to bed early.

----> Because of my tiredness, I went to bed early.'ư

`I.` 

`1.` Why shouldn't I climb that tree?

`-` Cấu trúc: Why + aux (not) + S + Vinf..?

2. Shouldn't Nga run down the stairs?

`-` Cấu trúc: Should (not) + S + Vinf..?

`3.` Don't play with a cat because it may scratch your face

`-` Cấu trúc câu mệnh lệnh phủ định: Don't + Vinf...

`-` Cấu trúc: Because + S + V

`4.` Don't touch the stove! You may get a burn.

`-` Cấu trúc câu mệnh lệnh phủ định: Don't + Vinf

`-` Cấu trúc: S + many + Vinf..

`II.` 

`1.` He has a toothache

`-` Cấu trúc: S + have/ has + N

`-` toothache (n): đau răng

`2.` What's the matter with your mother?

`-` What's the matter `=` What's wrong

`3.` My brother often walk to school

`-` on foot `=` walk: đi bộ

`4.` They went to the city centre by bus

`-` Cấu trúc: S + go/ travel + to + địa điểm + by + phương tiện