`8`.It's `3` years since I last saw her again

`->` It + is / has been + time + since + S + last + Ved / V2

`=>` Đã bao lâu ... kể từ khi ...

`9`.John hasn't been seen since he was leaving for Edinburgh

`->` BĐ `-` HTHT : S + have / has + been + VpII ( by O )

`->` Đi sau " since " luôn chia theo thì liên quan đến Quá khứ

`10`.They didn't like ice-cream when they ate too much and was sick

`->` When + S + Ved / V2 , S + Ved / V2

`=>` Dùng để diễn tả về `2` hành động đã diễn ra trong Quá khứ

`11`.John has been a television presenter for `5` years

`->` Thì HTHT ( ĐT Tobe ) : S + have / has + been + adj / n

`->` For + Time : Bao lâu

`=>` He , She , It `+` has

`\text{# TF}`

It's 3 years since I last saw her again

`-` Cấu trúc: It's + khoảng thời gian + since + S + last + Ved/Vc2 + ...

John hasn't been seen since he was leaving for Edinburgh

`-` Bị động HTHT: S + have/has + been + Vpp + .. + by O

They didn't like ice ream when they ate too much and was sick

`-` QKĐ: S + Ved/Vc2 + ... 

John has been a television presenter for 5 years

`-` Thì HTHT - cấu trúc: S + have/has + Vpp + ...