1. I haven't met him for two months. ( Thì hiện tại hoàn thành : S + have/has + not + V(PII) + O )

+) The last time I met him was two months ago. ( CT : The last time + S + V(ed/V(PII)) + was + khoảng thời gian )

+) It is two months since I last met him. ( CT : It is + khoảng thời gian + since + S + last + V + O )

2. She hasn't gone out with him for two years. ( Thì hiện tại hoàn thành : S + have/has + not + V(PII) + O )

+) She last went out with him two years ago. ( CT : S + last + V(ed/PII) + khoảng thời gian + ago )

1) I haven't  met  him for  two months.

( cấu trúc S  + have, has (not) /never +V3/V-ed +O+since /for).

   - the last time I met him  was two months. ( cấu trúc : the last time+S+QKĐ+was +kg thời gian )

    - It is two months since she last her met him. ( It is +time +since +S+last +QKĐ. 

2.She hasn't gone out with him for two years (cấu trúc S  + have, has (not) /never +V3/V-ed +since /for).

  - She last her  went out with him for two years ( cấu trúc S + last +QKĐ)