Qui est là ?
English: Who is there?
Simple interrogative pronouns in French (qui, que, quoi) are words used to ask questions about people or things.
Use these pronouns to ask who did something, who someone is, or what something is. Use 'qui' for people, 'que' for things (at the beginning of a question), and 'quoi' for things (after a preposition or at the end).
Qui est là ?
English: Who is there?
Que fais-tu ?
English: What are you doing?
Tu veux quoi ?
English: What do you want?
À qui parles-tu ?
English: Who are you talking to?
De quoi parlez-vous ?
English: What are you talking about?