`33.` Mary hasn't seen her son for 2 months.

`-` S + last + V2/ed + khoảng thời gian + ago

`->` S + haven't/hasn't + V3/ed + for + khoảng thời gian

`34.` My parents allow me to use the motorbike.

`-` let sb do sth = allow sb to do sth: cho phép ai làm gì

`35.` I do the dishes after meals.

`-` wash the dishes = do the dishes: rửa bát đĩa

`IV.`

`31.` His room is painted by the man every year.

`-` Bị động: HTĐ: S + is/am/are + V3/ed + (by O)

`32.` It rained heavily yesterday, but we went to school.

`-` Clause 1, but + Clause 2; nhưng `->` Chỉ sự đối lập

`33.` Bill hasn't met his parents for a year.

`-` It's + khoảng thời gian + since + S + last + V2/ed

`->` S + haven't/hasn't + V3/ed + for + khoảng thời gian

`34.` I didn't let them come in.

`-` allow sb to do sth = let sb do sth: cho phép ai làm gì

`35.` My sister takes responsibility for washing the dishes.

`-` be responsible for doing sth = take responsibility for doing sth: chịu trách nhiệm cho việc gì 

`33` Mary hasn't seen her son for `2` months.

`-` Hiện tại hoàn thành : S + have/has + not + V3/Vpp + O.

`34` My parents allow me to use the motorbike.

`-` S + allow + O + to V + O : Ai đó cho phép ai đó làm gì.

`35`  I do the dishes after meals.

`-` Sự việc thường xảy ra.

`=>` Hiện tại đơn : S + V(s,es) + O.

`31` His room is painted by the man every year.

`-` Bị động hiện tại đơn: S(pv) + be + V3/Vpp + O.

`32` It rained heavily yesterday, but we went to school.

`-` Mệnh đề đối lập:

`@` S + V + O + but + S + V + O.

`33` Bill hasn't met his parents for a year.

`-` for a year : Hiện tại hoàn thành.

`=>` S + have/has + not + V3/Vpp + O.

`34` I didn't let them come in.

`-` let + sb + V-inf + O: cho ai đó được phép làm gì.

`35` My sister takes responsibility for washing the dishes.

`-` take responsibility for doing sth : chịu trách nhiệm làm gì.