1. It has rain since luch time
2. I have stayed for a year
3. She has lived in London since 1985
4. Please hurry up! We have waited for an hour
5. I have known her since January
6. Nam's father has worked in this company for 20 years
7. I haven't seen Tom since Monday
8. The house is very dirty. We haven't cleaned it for ages
9. She has been sicked since Wednesday
10. Jonh has worked in that firm for six years
11. He has been in hospital for almost a month
12. They haven't sent him any money since last summer
* Dùng thì HTHT: S+ have/has + V3/-ed
* SINCE+ thời gian bắt đầu
FOR + khoảng thời gian