1.She last came here in 2008.

=> She hasn't_________

2. I haven't gone on a vacation for 2 years.

=> The last time_____

3. When did they get married?

=> How long______

`1` She hasn't come here since 2008

`2` The last time I went on a vacation was 2 years ago

`3` How long have they been married?

`-` CT :

S + last + V2/V-ed 

The last time + S + V2/V-ed + was + tg + ago

When did + qkđ 

S + has/have + ( not ) + V-II 

How long + htht 

$baoyen.$

`1` She hasn't come here since `2008` 

`=>` chuyển QKĐ sang HTHT, S have/has (not) V3/ed, since + mốc thời gian

`2` The last time I went on a vacation was 2 ago

`=>` The last time + S + Ved / V2 + was + time / timeline : Lần cuối làm gì

`3` How long have they been married?

`=>` How long + have/has + S + Ved/3?