1. the last time we were to the concert over a years
2. We haven't seen our grandfather for two years
3. 
4. 
5. It's the last time he was back to his village over 20 years
6.
7. We have't gone to a cinema for 2 years
8. We haven't seen him for Monday
9. I haven't seen David since 1989
 

1. the last time I went to the concert was 1 year ago
2. We haven't seen our grandfather for 2 years
3. This is the first time I've read such a romantic book
4. My father haven't seen my uncle for nearly 20 years
5. It's over 20 years since he was back to his village