33. Tom's mother told him not to spend too much time playing computer games. 

(Cấu trúc: S + told + sb + (not) + to + V)

34. He used to walk to school when he was in primary school.

(Cấu trúc: used to + Vbare)

35. The last time we visited our grandparents was 2 months ago.

(Cấu trúc: The last time + S + Verb (ed/ PI)+ was + mốc thời gian/ khoảng thời gian)

36. It is very popular for students to play badminton and tennis.

(Cấu trúc: It +tobe+ adj + for sb + to do sth)

`1.` Tom's mother told him not to spend too much time playing computer games.

- told sb (not) to V: bảo, yêu cầu ai (không) làm gì.

`2.` He used to walk to school when he was in primary school.

- S + adverb of frequency (trạng từ chỉ tần suất: always, usually, often, etc.) + V-ed `->` Diễn tả một thói quen trong quá khứ.

- Viết lại câu: S + used to + V-bare `->` Diễn tả một thói quen trong quá khứ, đã chấm dứt ở hiện tại.

`3.` The last time we visited our grandparents was two months ago.

- S + have/has + not + Vpp + for + [khoảng thời gian] =  The last time + S + V-ed + was + [khoảng thời gian] + ago.

`4.` It is very popular with students to play badminton and table tennis.

- S1 + be + adj + preposition (giới từ: with, to, for...) + S2 = It + be + adj + preposition + S2 + to + V.