1. since 自从，从……以后：
They have been close friends since childhood.
She has lived here since 1990.
I haven't been out much since coming here.
Since when have you been working on this project?
This has been my ideal since long ago.
what's the place we're passing through?
We helped her get out through the back door.
There is a path through the fields.
She must have been through a lot.
They went through many trials.
She told us about the hardships she had been through.
We learnt all this through John.
We learn to speak through speaking.
He obtained the work through his own efforts.
The war was lost through bad organization.
They lost the match through over-confidence.
We quickly saw through his trick.
So they got through it as quickly as possible.
He began to look through the photograph album.
She read through three of the passages.
He was ill all through November.
I'll like you to go through my book.
They stuck together through thick and thin.