`1.` has danced ( DHNB thì HTHT: "up till now" )
`2.` have eaten ( DHNB thì HTHT: "It's the first time" )
`3.` has called
`4.` have stayed
`5.` has written
`6.` have never eaten
* Note
`=>` `6` câu trên được dùng ở thì HTHT
`=>` Cấu trúc: S + have/has + Vp.p + .....