Đáp án:

`1.` have never worked

`2.` Have Robin ever missed

`3.` have known....for a long time now.

`4.` Have you dyed...yet

`5.` has visited

`6.` have helped...since

`7.` hasn't brushed.....yet

`8.` have already planted....

`9.` has grown up...since

`10.` haven't decided....yet

`+` Cấu trúc thì HTHT:
`(+)` Khẳng định: S + have/has + Ved/V3

`(-)` Phủ định: S + have/has + not + Ved/V3

`(?)` NGHi Vấn: Have/has + S + Ved/V3....?

`1.` have never worked

`2.` have Robin ever missed

`3.` have known/for 

`4.` have you dyed/yet

`5.` has visited

`6.` have helped/since

`7.` hasn't brushed/yet

`8.` have already planted

`9.` has grown up/since

`10.` haven't decided/yet

______________________

`-` Áp dụng:

`+)` thì hiện tại hoàn thành:

`->` S + have/has + (not) + Vpp + O.

`->` Have/Has + S + Vpp + O?