11. has worked

for+ khoảng tgian=> HTHT: S+ have/has+PII

12. haven't begun

for+ khoảng tgian=> HTHT: S+ have/has+PII

13. goes

at ten oclock this morning.=> HTĐ: S+ V(s/es)

14. called

yesterday=> QKĐ: S+V-ed/cột 2

15. haven't seen

yet=> HTHT: S+ have/has+PII

16. bought

ago=> QKĐ: S+V-ed/cột 2

17. arrived - took - went

last night=> QKĐ: S+V-ed/cột 2

`11.` has worked (for thirty-five years: DH thì HTHT)

`12.` haven't begun (yet: DH thì HTHT)

`13.` went (this morning: DH thì QKĐ)

`14.` called (yesterday: DH thì QKĐ)

`15.` haven't seen (yet: DH thì HTHT)

`16.` bought (two weeks ago: DH thì QKĐ)

`17.` arrived - had - went (Last night: DH thì QKĐ)

`->` Cấu trúc

`-` thì Quá khứ đơn:

`-` với động từ:

`(+)` S + Ved/V2

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

`(?)` Did + S + V?

`-` thì Hiện tại hoàn thành:

`-` với động từ:

`(+)` S + have/has + Ved/V3

`(-)` S + haven't/hasn't + Ved/V3

`(?)` Have/Has + S + Ved/V3?