`1` The last time we went to the concert over a year ago . 

`2` We haven't seen our grandfather for two years . 

`3` This is the first time I have read such a romantic story . 

`4` My father hasn't seen my uncle for nearly twenty years . 

`5` It's over 20 years since he went back to his village .  

`6` Xem lại đề 

`7` We haven't gone to a cinema for two years . 

`8` We haven't seen him since Monday . 

`9` I haven't seen David since 1989 . 

The last time + S + Ved/cột 2 + was + time (trong quá khứ)

S + last + Ved/cột 2 + O 

S + hasn't/haven't + Vpp + O 

It's + time + since + S + (last) +  Ved/cột 2 + O