Answer:
Where is before used?
Before can be used in the following ways: as a conjunction (connecting two clauses): Think carefully before you choose. as a preposition (followed by a noun): We moved to London before the war. as an adverb (without a following noun): I'd met him once before.
Examples ;-
"the page before this one has the quote you need"
"it wasn't long before I dozed off"
"I found out six weeks before then"
"I was there the week before last"
We arrived shortly before six o'clock.
He left just before sunrise.
I've never seen her so happy before now.
Call me before your arrival.