`color{red}{#lgdr}`

`1` Mai suggests that we should use solar energy to save money .

`-` S + suggest + that + S + should + V-inf + O : Ai đó gợi ý rằng nên làm gì .

`2` It is necessary for you to revise the lessons before the exams .

`-` It is necessary + for O + to V : Cần thiết làm gì .

`3` He wishes his son didn't spend much time playing games .

`-` Câu ước không có thật ở hiện tại : S + wish + S + V(quá khứ) + O .

`4` My father used to smoke a lot when he was a young man .

`-` S + used + to V : Ai đó từng làm gì .

`1`. Mai suggests that we should use solar energy to save money.

`-` S + suggest + that + S + should + V-inf: đề nghị nên làm gì

`2`. It's necessary for you to device lessons before exams.

`-` It's necessary + (for O) + to-V: cần thiết (cho ai) làm gì

`3`. He wishes his son didn't spend much time playing games.

`-` Câu ước ở hiện tại: S + wish(es) + S + V-ed/c2

`-` S + spend + time + V-ing: dành bao lâu làm gì 

`4`. His father used to smoke a lot when he was a young man.

`-` S + used to + V-inf: đã từng làm gì

`-` QKĐ: S + was/were

`-` a + N-số ít bắt đầu bằng phụ âm