I haven't heard from him since August 

+ The last time I heard from him in August.

I haven't seen Tom since he moved to Bristol

+ We last saw Tom when he moved to Bristol.

The last time she went out with him was two years ago

+  She hasn't gone out with him for two years.

->Cấu trúc QKĐ=HTHT

- The last time + S + V2/ed + was + time + ago: Lần cuối ai đó làm gì vào thời gian nào

- S + have/has + V3/ed + for/since + khoảng thời gian/mốc thời gian

- S + have/has + not/never + V3/ed + before

• The last time I heard from him was in August.
• We last saw Tom when he moved to Bristol.
• She hasn't gone out with him since two years ago.