is before a conjunction

Yes, “before” can function as a conjunction, but it can also be a preposition or an adverb, depending on how it is used in a sentence.

Uses of “Before” as a Conjunction

A conjunction connects clauses, and “before” does this when it introduces a subordinate clause.

• We finished setting up the POS system before the restaurant opened.
• Make a reservation before you arrive.
• He checked the order before he confirmed it.

Other Uses of “Before”:

1. As a Preposition (followed by a noun or pronoun)
   • Please arrive before 6 PM.
   • The dessert was served before the coffee.
2. As an Adverb (modifying a verb, meaning “earlier” or “previously”)
   • I’ve seen this restaurant before.
   • She had never tried sushi before.

How to Identify “Before” as a Conjunction:

• If “before” connects two clauses, it is a conjunction (e.g., He left before the meeting started).
• If “before” is followed only by a noun or pronoun, it is a preposition (e.g., before the meeting).
• If “before” stands alone modifying a verb, it is an adverb (e.g., She had visited before).

Thus, “before” can be a conjunction when it introduces a clause, but it is not always a conjunction.