How to Say "you use" in Spanish
The Spanish word for “you use” is “usas” — A1 level. This is a very common word in everyday Spanish.

Examples
¿Qué tipo de computadora usas para estudiar?
What type of computer do you use to study?
Siempre usas mi bolígrafo sin preguntar.
You always use my pen without asking.
Si usas esa aplicación, tendrás un descuento.
If you use that application, you will have a discount.
The 'Tú' Form
'Usas' is the verb form you use when talking directly to a friend, family member, or someone younger—the informal 'you'.
Regular -AR Pattern
Since 'usar' is a regular verb ending in -AR, the 'tú' form always ends in -as in the present tense (e.g., 'hablas', 'compras', 'usas').
Confusing 'Tú' and 'Usted'
Mistake: “Using 'usas' (tú) when you should be formal: '¿Usted usas mi teléfono?'”
Correction: For formal situations, use 'Usted usa': '¿Usted usa mi teléfono?'
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