How to Say "you lie" in Spanish
The Spanish word for “you lie” is “mientes” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
VerbA2
Present tense, speaking directly to 'tú'

Examples
Si dices eso, **mientes**.
If you say that, you are lying.
No creo que **mientas** sobre algo tan serio.
I don't believe that you would lie about something so serious.
The 'E to IE' Change
In the present tense, the 'e' in the stem of 'mentir' changes to 'ie' (miento, mientes), except for the 'nosotros' and 'vosotros' forms (mentimos, mentís).
Subjunctive Form
When you use 'mientes' in the present subjunctive (mientas), it usually follows a verb expressing doubt, denial, or emotion, like 'Dudo que mientas' (I doubt that you lie).
Forgetting the Stem Change
Mistake: “Tú mentís.”
Correction: Tú mientes. Remember the vowel change is key to this verb's identity.
Related Translations
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