Have you known her since 1990?
I haven't seen Tom since 1988.
We've been friends ever since.
It's been raining since morning.
It has been cold since yesterday.
It has been raining since Sunday.
It has been ten years since I left Japan.
My mother has been sick since last month.
She has been absent since last Wednesday.
Since I had a cold, I didn't go to school
I have known Tom since I was a little boy.
I haven't been back here since the incident.
She has known him since they were very young.
Tom and Sue have known each other since 1985.
He has been playing tennis since this morning.
Since my mother was sick, I couldn't go there.
Since you did the cooking, I'll do the dishes.
I've been very busy since the new term started.
John and Mary have known each other since 1976.
Tom has lived in New York since he was a child.
I haven't eaten French food since I left France.
I've made a lot of friends since I entered college.
I haven't eaten since breakfast and I'm very hungry.
I have not eaten any seafood since the recent oil spill.
Since he was very drunk, he couldn't drive his car home.
I haven't been back here since that unfortunate incident.
Since I had met him once before, I recognized him right away.
Since it's raining, it would be better it you stayed at home.
I'm pretty hungry since I haven't eaten since early this morning.
It's been raining heavily since this morning, so I don't want to go anywhere.
I haven't heard anything from him since then. I wonder what in the world he's doing.
Make your airplane reservations early since flights fill up quickly around Christmas.
Since I have no children, I have more time to spend doing volunteer work than parents do.
For some reason, people have been avoiding me like the plague ever since I got back from India.