Leave against - place an object touching another object
I’ll leave the groceries against the door.
Leave at - a time to go
I left the party at 7.
Leave behind - forget
I’m always leaving something behind.
Leave for - go to a place
I left for work at 8.
Leave in - an amount of time to go
We’ll be leaving in 5 minutes.
Leave off - stop doing something
Leave off, stop messing up my hair!