`\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 you written 

`2.` have learnt

`3.` has always been wanting

`4.` has worked 

`5.` has been standing

`6.` has ended

`7.` have they been losing

`8.` have been studying

`9.` Have you been waiting

`10.` Have you cooked