We use through as a function word to indicate movement from one side or point to another one.
I drove through the city last night.
He drove the choke through the board.
It is used to indicate a passage from one end to another.
This is a side road through the field.
I walked through the forest last night. I was scared!
It can refer to a passage into and out of a treatment or process.
The matter went through the manager’s hand.
The bill went through the legislation.
Through can indicate relationships in the family.
We are related through our aunts.
We are cousins through our parents.
Can be the way of spreading news or any matter .
I got to know the good news through your wife.
We were allowed to get into the club through your friend’s help.
It can refers to a set of condition
I went through a torture yesterday while I was writing my test. It was so hard!
He got through his illness in 3 days.
Through also indicate a period of time:
Monday through Saturday.
January through June.
From beginning to the end of a process or procedure:
The firemen didn’t stop working all through the disaster.
I could not stop laughing all through the theatre play.
Through can express a meaning: because of something or somebody or due to
My wife could not catch her connection flight through delay of her first flight.
It was all through her we lost our money.