I haven't eaten since breakfast.

It's been raining since morning.

Since you asked, I'll explain.

She's lived here since childhood.

I haven't eaten anything since breakfast.

Since then, I've changed my mind.

He has been custody since his arrest.

I haven't seen him since last year.

I haven't seen him since the party.

They have been friends since high school.

He hasn't called me since last week.

I've been studying French since high school.

Since it's late, we should leave now.

I've been waiting for you since noon.

Polar bears have been a protected species since 1973.