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je
Used to refer to oneself as the subject of the sentence. For example, "Je mange" means "I eat."
tu
Addressing someone familiar or informal with whom you have a close relationship. For instance, "Tu parles français" translates to "You speak French."
il, elle, on
"Il" for masculine singular subjects, "elle" for feminine singular subjects, and "on" for informal "we" or "one" in a general sense.
nous
Refers to a group of people including the speaker. "Nous étudions" means "We study."
vous
Used to address multiple people or show respect in formal situations. For example, "Vous êtes prêts?" means "Are you ready?"
ils, elles
"Ils" for masculine plural subjects, and "elles" for feminine plural subjects.