"He only brushed his teeth once a month."

Translation: Il ne se brossait les dents qu'une fois par mois.

[DOette]

Why not Il se brossait les dents seulement une fois par mois?

[Seattle_Scott]

That should also work. But I think Duo is trying to reinforce the pattern "ne...que" for only.

[Graham207673]

What worries me is how far can the negative adverb be from the 'ne'? Would "Il ne se brossait les petites dents en or qui sont situées à l'arrière de sa grande bouche qu'une fois par mois" work? DeepL and Reverso seem to think it would (not that I would trust them with such a sentence)

[--Roody--]

I have read sentences where ne and que are very far apart. It can be very confusing. I think the long sentence you made up works well. :)

[HuibRenes]

Brooosset

[Gerhardino2]

I was correctet "ses dents" when I choose "les dents" from the possibilities- the correction should be as correcz as the possibilities are.

[MaryDunlop1]

Does "ne se brossait " assume "les dents" sont "ses dents"?