`\text{1,}` Have you ever seen 

`\text{2,}` hasn't checked

`\text{3,}`When did you last phone

`\text{4,}` have eaten

`\text{5,}` have used

`\text{6,}` have visited / was

`\text{7,}` haven't seen

`\text{8,}` began / was

`\text{9,}` has been / got

`\text{10,}` Have you ever been / went

-------------------------------------

`\text{Thì HTHT : }`

`\text{- Công thức :}`

( + ) S + have / has + Ved / VpII + O

( - ) S + have / has + not + Ved / VpII + O

( ? ) Have /Has + S + Ved / VpII ?

`\text{- Dhnb :}`

+ yet , just , already

+ ever 

+ since + mốc tgian , for + khoảng thgian

`\text{Thi QKĐ :}`

`\text{- Công thức :}`

( + ) S + Ved /VpI + O

( - ) S + didn't + Vinf + O

( ? ) Did + S + VInf?

`\text{- Dhnb:}`

+ yesterday

+ last week / year / month / Monday

+ in the past

+ ago

` 1`. Have you ever seen

` 2`. hasn't checked

` 3`. did you last phoned

` 4`. have eaten

` 5`. have just visited

` 6`. have visited/was

` 7`. haven't seen

` 8`. began/was

` 9`. has been/got

` 10`. Have you ever been/went

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

` @` Hiện tại hoàn thành

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

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

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

` -` DHNB : yet, since, for, .....

` @` Quá khứ đơn

` (+)` S + V-ed/V2 + ...

` (-)` S + didn't + V-inf + ...

` (?)` Did + S + V-inf + ...?

` -` DHNB : ago, yesterday, last, ....