`4`

`-` Cấu trúc: S + last+ V2/V-ed+O + khoảng thời gian + ago.

`vd:`The last time I played the guitar was 2 months ago

`-` Cấu trúc:S+has/have+not+ V-pp+O+ for+ khoảng thời gian

`vd:` I have lived in China for 2 years

`-` cấu trúc:It's + khoảng thời gian +since+ S+ last+ V2/V-ed+O.

`vd:`It has been 2 months since I played the guitar

`5`

`-` cấu trúc:S+ last + V2/V-ed+O+ in + năm/thế kỷ / when + mốc thời gian

`vd:` She last graduated from university in 2017

`6` It's + khoảng thời gian +since+ S+ last+ V2/V-ed+O. ( giống câu 4 trên)