* "Tu" is the informal, familiar form of "you". It's generally used with someone you know well.
* "Comprende" is the third-person singular form of the verb "comprender" (to understand). This form is used when referring to someone else, not the person you're speaking to directly.
* "Bien" means "well."
* "El espanol" is "Spanish" (the language).
To make it grammatically correct and meaningful, you could say:
* "¿Entiendes bien el español?" (Do you understand Spanish well?) This is the most direct and common way to ask if someone understands Spanish.
* "Tú comprendes bien el español" (You understand Spanish well.) This is a statement, affirming that the person understands Spanish.
It's important to use the correct verb conjugation and pronouns when speaking Spanish.