`***` Hiện tại hoàn thành

`(+)` S + have/has + V-ed/c3

`(-)` S + haven't/hasn't + V-ed/c3

`(?)` Wh + Have/Has + S + V-ed/c3 + ... ?

`1.` have ever heard

`2.` The government has made

`3.` has Doctor Christie been

`4.` Have Inuit people used

`5.` they have listened

`6.` Have you ever taken

`7.` I have not finished

`8.` The astronaut has undergone

`9.` Lucas has just bought-have-seen

`10.` has he written-he has recently published

` 1` . have ever heard

` 2` . The government has made

` 3` . has Doctor Christie been

` 4` . Have Inuit people used

` 5` . they have listened

` 6` . Have you ever taken

` 7` . I have not finished

` 8` . The astronaut has undergone

` 9` . Lucas has just bought-have-seen

` 10` . has he written-he has recently published

` -----------` 

` @` Hiện tại hoàn thành

` (+)` S + has/have + V3/V-ed + ...

` (-)` S + has/have + not + V3/V-ed + ...

` (?)` Has/have + S + V3/V-ed + ....?

` ***` DHNB : for, since, ever, ....