Learn the personal pronouns (subject) in English.

Singular: I - You - He, She, It
Plural: We - You - They

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SINGULAR

I (me)
You
He (boy) She (girl) It (thing)

PLURAL

We (you & I)
You (= you guys)
They (people or things)
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I + You = We
You + You... = You (or "you guys / you all")
He + He + She... = They
It + It...= They