`2` has done

`3` has travelled

`4` has visited

`5` hasn't gone

`6` has promised

`7` has gone

`-----------`

`***` Hiện tại hoàn thành

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

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

`(?)` (Wh) + Have/Has + S + V3/ed?

`->` DHNB: already, recently, just, yet, for + khoảng thời gian, since + mốc thời gian, once, twice, three times,... 

`-` I, you, we, they, N số nhiều + have

`-` He, she, it, N số ít + has