Je me brosse les dents devant le miroir.

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Breakdown of Je me brosse les dents devant le miroir.

• devant: in front of
• me: myself
• se brosser: to brush

Questions & Answers about Je me brosse les dents devant le miroir.

Why is it me brosse and not just brosse?

Because se brosser is a reflexive verb when you’re brushing a part of your own body. The reflexive pronoun (me, te, se, nous, vous, se) shows the action is done to the subject.

• Je me brosse les dents = I brush my own teeth.
• Je brosse les dents (no reflexive) = I brush teeth (someone’s teeth in general, not clearly mine).
• Je brosse le chien = I brush the dog (non‑reflexive, different meaning).

Why is it les dents and not mes dents?

With body parts, French usually uses the definite article (le, la, les) when the possessor is clear from a reflexive pronoun or the context. The reflexive me already tells us the teeth are mine, so les dents is the natural choice.
You’d use a possessive only to avoid ambiguity or add emphasis:

• Je me brosse les dents. (normal)
• Je me brosse mes dents. (nonstandard/odd; double marking)
• Je brosse les dents de mon fils. (someone else’s teeth)

Is Je brosse mes dents acceptable?

It’s grammatically possible, but it sounds unnatural in everyday French. Native speakers say Je me brosse les dents. Use the reflexive construction with the definite article.

Is ever correct?