I have been here since 1992. 1992年起，我一直在这儿。
2. since +一段时间+ ago.
We have been here since five months ago.我们在这儿，已经有五个月了。
3. since +从句。
Great changes have taken place here since he left. 自从他离开以来这里发生了巨大的变化。
Great changes have taken place in our hometown since you left. 你走后，咱们的家乡发生了巨大的变化。
I've known her since I have lived here(或ever since I lived here /#since I came here).自从我住到这儿以来我就认识她。（完成时）
I haven't heard from him since he lived (或was) in Beijing.自从他离开北京,我没有收到过他的来信。（过去时）
How long is it since you smoked?你戒烟多久了(或你多长时间没抽烟了)?
4. It is +一段时间+ since从句。
①lt is three years since the old man died.那位老人去世已有3年了。
②It is five years since I joined the army.我参军已有五年了。
1. ______ five years
2._______ five years ago
3. _______ last month
6. _______ 6 o’clock
7. ______ 5 hours
8._______ an two ago
9. _______they were children
10. _____ lunch time
11.______ he left there
12. SHe has lived in Nanjing ________ the year before last.
13. I’ve known her __________ we were children.
14. Our teacher has studied English _______ two years.
15. He has been away from the city _________ about nineyears.
16. It’s about five years __________ he left the city.
答案：1、for 2、since 3、since 4、since 5、since 6、since 7、for 8、since 9、since 10、since 11、since 12、since 13、since 14、for 15、for 16、since