=>
1. The last time Nam phoned Chau was 5 years ago.
-> The last time + QKĐ (lần cuối)
2. Linh hasn't written to Vu before.
-> HTHT have/has (not) V3/ed
3. Dat hasn't seen Nhi for 3 days.
-> HTHT have/has (not) V3/ed, for + khoảng thời gian
4. It's the first time we have watched this film.
-> It's the first time + HTHT (lần đầu tiên)
5. The last time he helped her was 5 months ago.
-> the last time + QKĐ (lần cuối)
6. How long have you learned English?
-> How long + HTHT : Bao lâu?
7. I haven't written a letter to my aunt since May.
-> HTHT have/has (not) V3/ed, since + mốc thời gian
8. Nga has learned French since last year.
-> HTHT have/has (not) V3/ed, since + mốc thời gian
9. I haven't seen her since 2000.
-> HTHT have/has (not) V3/ed, since + mốc thời gian