I haven't seen you here before.

I Pronoun

— The person who is speaking or writing I am writing this, and you are reading it.

I Noun

— The ninth letter or the alphabet; previous H, next J. I is a vowel.

I Symbol

— A symbol meaning first, as in "George I" (which is said as "George the first"). — The symbol for iodine on the periodic table of elements. — The symbol for electrical current.

I Number

— This is the roman numeral for one (1). It may be written as I or i.

i Noun

— The ninth letter or the alphabet; previous H, next J. I is a vowel.

haven't verb

— have not (negative form of have)

seen verb

— (nonstandard, dialectal) ; saw.

seen noun

— The letter س in the Arabic script.

you Pronoun

— Used instead of the name of the person being spoken to; it is a second-person pronoun. You are my best friend. Can I go to the shops with you? — Used to talk about anyone. You have to be 18 years old to see that film. She has problems with her eyes, and can't see you properly.

you Determinative

— Used before a word that means the person or people someone is talking to. You guys can leave now.

here Preposition

— In this place, the current location. Why are you looking over there for the book? It's right here.

before Preposition

— If mathx/math happens before mathy/math, mathx/math happens first and mathy/math happens second. He worked in a gas station before he became famous. Put out the fire before the house burns down. I have not been there before. She finished before me. — in front of something She stood before him, looking into his eyes. — until It took a few moments before I realized that she was joking.