- From a particular time in the past until now or until a later time in the past.
- I haven't been there since 1969.
- Since you told me about it, I've been thinking a lot.
- Since you can't be there, we'll try for another day.
- In the sense of time, since is usually used with the perfect aspect.
- I've been waiting here since ten o'clock.
- The school has been open since 2002.
- It was only five days since they had met.