How to Say "you sleep" in Spanish
The most common Spanish word for “you sleep” is “duermes” — use 'duermes' when you are speaking directly to one person informally (like a friend) and asking a question about their current sleeping habits or stating a fact about them in the present tense..
duermes
/DWER-mess//ˈdweɾmes/

Examples
¿Duermes bien, amigo?
Do you sleep well, friend?
Siempre duermes hasta tarde los sábados.
You always sleep in late on Saturdays.
Si duermes ahora, no tendrás sueño esta noche.
If you sleep now, you won't be tired tonight.
The 'tú' Form
This form, 'duermes,' is only used when you are talking directly to one person you know well (like a friend or child). If you are talking to an elder or someone formally, you would use 'usted duerme'.
The Stem Change Rule (o → ue)
The verb 'dormir' is tricky because the 'o' changes to 'ue' in the present tense forms, like 'duermo' and 'duermes.' This happens in most forms except 'nosotros' and 'vosotros,' where it stays 'dormimos' and 'dormís'.
Forgetting the Stem Change
Mistake: “¿Tú dormes aquí?”
Correction: ¿Tú duermes aquí? The 'o' must change to 'ue' when you use the 'tú' form in the present tense.
Using the Wrong Pronoun
Mistake: “Él duermes mucho.”
Correction: Él duerme mucho. 'Duermes' is only for 'tú' (you); for 'él' (he), you must use 'duerme'.
duermas
/DWER-mahs//ˈdweɾmas/

Examples
No quiero que te duermas tarde.
I don't want you to sleep late.
No duermas en el sofá.
Don't sleep on the sofa.
Espero que duermas bien.
I hope you sleep well.
The 'Switch' Verb Form
This is a special version of the verb 'dormir.' We use this 'duermas' form when we are talking about wishes, emotions, or things that might not be facts yet.
Negative Commands
When you want to tell a friend 'Don't sleep,' you must use 'no duermas.' You cannot use the regular 'duermes' for this.
Using 'Duermes' for Commands
Mistake: “No duermes en clase.”
Correction: No duermas en clase. In Spanish, when you say 'Don't...', the ending of the verb usually flips (for -ir verbs, the 'e' flips to an 'a').
Indicative vs. Subjunctive for 'You Sleep'
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