`1.` have you seen

`2.` have been

`3.` have forgotten

`4.` has lost

`5.` have waited

`6.` Have you ever seen

`7.` Have worked

`8.` have lived

`9.` have you been

`10.` have looked

`11.` has happened

`12.` has cooked

`13.` has learned/learnt

`14.` has teached

`15.` has studied

`16.` has done

$\text{cấu trúc của thì HTHT }$

$\text{ (+) S+have/has+VpII+O}$

$\text{ (-) S+haven't/hasn't+VpII+O}$

$\text{ (?) Have/Has+S+VpII+O+?}$

              $\text{ Wh+have/has+S+VpII+?}$

$\text{*lưu ý:}$

I/you/we/they + have 

He/she/it + has

$\text{@cinderellinh}$

`Answer:`

`1.` have you seen (since: DH thì HTHT)

`2.` have been (for 20 years: DH thì HTHT)

`3.` have forgotten (already: DH thì HTHT)

`4.` has lost  

`5.` have waited (for two hours: DH thì HTHT)

`6.` Have you ever seen (ever: DH thì HTHT)

`7.` have worked

`8.` have lived (since 1970: DH thì HTHT)

`9.` Have you been

`10.` have looked

`11.` has happened

`12.` has cooked

`13.` has learned (for three years: DH thì HTHT)

`14.` has taught (for six years: DH thì HTHT)

`15.` has studied (for six month now: DH thì HTHT)

`16` has done 

`->` Cấu trúc thì Hiện tại hoàn thành:

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

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

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

`+` Chủ ngữ: I/ they/ we/ you/ N(số nhiều) `->` trợ động từ "have"

`+` Chủ ngữ: It/ he/ she/ N(số ít) `->` trợ động từ "has"