What part of speech is “before” in the sentence “I am sure I have met your brother before”?

by

(A) Noun
(B) Adjective
(C) Adverb
(D) None of these

🧠 Explanation:

  • In the sentence "I am sure I have met your brother before", the word "before" describes *when* the action took place.
  • It modifies the verb "met", providing information about the time of the action.
  • Words that modify verbs and answer questions like when, where, how, or to what extent are classified as adverbs.
  • So, "before" in this context is functioning as an adverb. Correct option is (C) Adverb.