Hello
Qui is "who" for ask " Qui est-il? " ( Who is he ) for a person
Quoi is "what" you can use it when you don’t understand something and say « Quoi ? » but for being more polite say « Comment ? ; Pardon ? ; Pouvez-vous répéter » ( How ? ; Sorry ? ; Can you repeat please ? )
Que is as " that/than " exemple : " He is more handsome THAN ( QUE ) him " or " there is something THAT ( QUE ) I need to say to you "
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Hope it help
Byye
