`37`. I have never met him before.

- This is the first time + S + have/has + Vpp

= S + have/has + never/not + Vpp + before

`38`. They used to walk in the park after dinner.

- used to + V nguyên mẫu: đã từng làm gì trong quá khứ nhưng bây giờ không còn nữa

`39`. We have learnt English for seven years.

- S + have/has + Vpp + for + khoảng thời gian

= S + started + Ving + thời gian + ago

`40`. Why don't we go to My Khe Beach this weekend ?

- Why don't we + V nguyên mẫu ?

`\text{37.}` I have never met him before

`\text{-Cấu trúc:}`

This/ It is the first time+S+have/has+(ever)+P2

⇒S+haven't/hasn't+P2+before

`\text{38.}` They used to walk in the park after dinner

`\text{-Cấu trúc:}` 

-Used to+V : Đã thường làm trong quá khứ

`\text{39. Có 2 cách làm: }` 

-We have learned English for seven years

-We have been learning English for seven years

`\text{-Cấu trúc:}`

S+started/began+ $\begin{cases} V-ing\\to-v\\ \end{cases}$+$\begin{cases} in/when\\time+ago\\ \end{cases}$

⇒S+have/has+$\begin{cases} been+V-ing\\P2\\ \end{cases}$+since/for

$\text{40.}$ Why don't we go to My Khe beach this weekend?

⇒$\text{Cấu trúc:}$

-Why don't we+V

$\text{mct}$