`@Hyn`

`1.`

`( - )`He hasn't lived here for three years.
`( ? )`Has he lived here for three years`?`

`2.`

`( + )` We have been here for two weeks.
`( ? )` Have we been here for two weeks`?`

`3.`

`(+)` They haven't missed the train
`( - ) `They have missed the train

`4.`

`( - )`I haven't had breakfast this morning.
`( ? )`Have you had breakfast this morning`?`
`5.`

`( + )` She has passed the exam.
`( ? )`Has she passed the exam`?`

`6.`

`( + ) `I have met his mother
`( - )`I haven't met his mother

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Công thức :

`+ )` S `+` have/ has `+` $V_{II}$ 

`- )`S `+` have / has `+` not `+` $V_{II}$ 

`? )`(WH) `+`have /has `+` S `+` (not) `+` $V_{II}$ 

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

Danh từ số ít `+` has(not)

Danh từ số nhiều `+` have(not)

$\text{*Structure: Present Perfect}$

$\text{(+) S + have/has + Ved/V3 + ...}$

$\text{(-) S + have/has not + Ved/V3 + ... }$

$\text{(?) Have/Has + S + Ved/V3 + ...?}$

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

`1.` 

`(-)` He hasn't lived here for three years.

`(?)` Has he lived here for three years?

Giải thích: he là ngôi thứ 3 số ít `->` trợ đt là has 

Phủ định là hasn't

`2.` 

`(+)` We have been here for two weeks.

`(?)` Have we been here for two weeks?

Giải thích: we là ngôi thứ 1 số nhiều `->` trợ đt là have

Khẳng định bỏ not

`3.` 

`(+)` They have missed the train.

`(-)` They haven't missed the train.

Giải thích: they là ngôi thứ 3 số nhiều `->` trợ đt là have

Phủ định là haven't

`4.` 

`(-)` I haven't had breakfast this morning.

`(?)` Have I had breakfast this morning?

Giải thích: I là ngôi thứ 1 số ít `->` trợ đt là have

Phủ định là haven't

`5.` 

`(+)` She has passed the exam.

`(?)` Has she passed the exam?

Giải thích: she là ngôi thứ 3 số ít `->` trợ đt là has

Khẳng định bỏ not.

`6.` 

`(+)` You have met his mother.

`(-)` You haven't met his mother.

Giải thích: you là ngôi thứ 2 `->` trợ đt là have

Phủ định là haven't

$chucbanhoctot$
$\textit{~KaitoKid!}$