There are 16 verbs in French that require être rather than avoir in the passé compose. Sometimes there is a passé. Passé uses être to talk about physically passing by something. These irregular verbs also must agree in gender and in number.
I tried something a bit different this time! What do you think about this format, you likey? Miti ps: I found it hard to transcribe the “u” sound in “nul” as I don’t think there is anything close to it in English. Or maybe “juice”.