=>

1. left 

-> last week (QKĐ, S V2/ed)

2. has lost

-> thì HTHT, S have/has (not) V3/ed

3. has sung

-> a hundred times (HTHT)

4. has had

-> for a week (HTHT)

5. have complained

-> a dozen times (HTHT)

`1`. left 

`-` QKĐ, dấu hiệu: last week

`2`. has lost

`-` HTHT, dấu hiệu: can't `->` chia ở hiện tại, nên vế trước không thể dùng thì QKĐ

`3`. has sung

`-` HTHT, dấu hiệu: a hundred times

`4`. has had

`-` HTHT, dấu hiệu: for a week

`5`. have complained

`-` HTHT, dấu hiệu: a dozen times

`_________________________________`

`***` Cấu trúc thì QKĐ:

`+)` S + V-ed/c2

`-)` S + didn't + V-inf

`?)` (Wh) + Did + S + V-inf?

`***` Cấu trúc thì HTHT:

`+)` S + have/has + V-pII

`-)` S + have/has + not + V-pII

`?)` (Wh) + Have/Has + S + V-pII?