"When the star appeared, everyone shut up."

Translation: Quand la star est apparue, tout le monde s'est tu.

[ckendall19]

quand l'etoile est apparue tout le monde s'est tu is wrong
how do we know from the english whether it's a celebrity star or an astronomical star?

[NickWoodal1]

Why is it est apparue and not a apparu?

[ZarrouguiL]

Because the word star is feminine. The past participle needs to agree.

[jwbards]

Apparaître uses both avoir and être as the auxiliary verb, yes? When does it use which?

[ZarrouguiL]

Apparaître uses both avoir and être as the auxiliary verb, yes?

To my knowledge, it only uses être as the auxiliary verb.

[jwbards]

I ran across another comment that discusses it: https://forum.duolingo.com/comment/40063794
Seems like the use with avoir is uncommon enough that I'd be best off forgetting it for now. :)

[NickWoodal1]

Thanks, that is a useful link.

[Debra836963]

'Shut up' is such a rude expression and I'm sure the sentence isn't meant that way. Fell quiet seems to be what is meant.

[LenReed]

Is the participle of se taire invariant? My conjugation app says "Elle s'est tu" and "Ils se sont tu" not tue and tus as I'd expect.

[Oemerich]

Same question here :)

[ZarrouguiL]

https://la-conjugaison.nouvelobs.com/du/verbe/se_taire.php

[LenReed]

Ok so it does take the usual endings. It's odd that my usually reliable app says elles se sont tu. That app is "Conjugaison française" for Android. Despite this one weird issue, I've found the app really useful and recommend it.