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

2. We haven't done our grandfather for two years. 

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

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

( S + have/has + not + Vpp + for + khoảng thời gian ).

5. It has been over 20 years since he last went back to his village.

6. The boys found the journey to the village very interesting.

7. We haven’t gone to a cinema for 2 years ago.

8. We haven't seen him since Monday.

=> S + have/has + V(pp) + since + mốc thời gian.

9. I haven't seen David since 1989.

Good luck with your studies!~