1. It's ten years since I knew Julie.

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

= It + tobe + time + since + S (last) V2/ed

2. The last time I had my motorbike fixed was when I was in Hanoi.

- S + last + V2/ed + time trong quá khứ

= The last time + S + V2/ed + was + time trong quá khứ 

3. It is been a day since I lost my key.

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

= It + tobe + time + since + S (last) V2/ed

4. How long have you learned English?

- When + did + S + start/begin + to V/Ving?

= How long + has/have + S + PII?

5. It is 2 months since I met Lisa.

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

= It + tobe + time + since + S (last) V2/ed