Breakdown of ¿Cómo se llama tu perro?
el perro
the dog
cómo
how
tu
your (singular)
se
himself / herself / themselves (reflexive)
Questions & Answers about ¿Cómo se llama tu perro?
Why do we use cómo (how) when the English translation asks "what"?
What is the word se doing in this sentence?
se goes with the verb llama to show that the action reflects back on the subject (the dog). It is called a reflexive pronoun. In English, it acts like "itself" in the literal translation "How does your dog call itself?".
Why doesn't tu have an accent mark over the "u" here?
In Spanish, tú with an accent mark means "you" (as a subject, like "you are"). Without the accent mark, tu means "your". Since we are saying "your dog" here, we use the possessive version without the accent.