`\color{#145277}{N}\color{#246483}{a}\color{#34768F} {e}\color{#44889B}{u}\color{#539AA7}{n}`

`***` Thì HTHT : 

`@` For `+` quãng thời gian : trong khoảng (for a month, for a long time)

`@` Since `+` mốc thời gian : từ khi (since `2006`, since `2008`)

`(+):` S + have/ has + VpII

`(-):` S + have/ has + not + VpII

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

       WH-word + have/ has + S (not) + V3 `?`

`->` S = I/ We/ You/ They + have

`->` S = He/ She/ It + has 

`***` Thì HTHT tiếp diễn :

`(+):` S + have/ has + been + V_ing

`(-):` S + have/ has + been + not + V_ing

`(?):` Have/ Has + S + been + V_ing `?`

       WH-word + have/ has + S + been + V_ing`?`

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

`1.` have done

`2.` has decorated

`3.` has been going

`4.` have been telling

`5.` Have you changed

`6.` has been crying

`7.` have been drinking

`8.` have you done

`9.` have been tidying

`10.` have done