¿A qué se dedica tu hermano? = What does your brother do? [usually relating to work].
The term dedicar means to devote or to dedicate, so you could think of it as: What does your brother dedicate his time to, and we usually dedicate most of our time to work. The phrase is an idiom, which is probably why you couldn't find the exact definition in a dictionary.
When talking to your friend, you would say: "¿Cómo se llama tu hermano?"
"Se suponia que me llamarias" or "Tu debias llamarme".
Su / tu / vuestro hermano se llama...=Your (formal singular and plural/singular informal//plural informal) brother is called..Mi hermano se llama... = My brother is called....
"Tu hermano" means "your brother" in English.
I know that you...
Amor mio, no se (accent on the 'e') = I don't know, my love. Tu piensa(s) (que) tu eres mas smart que.... = You think you are smarter than.... (I suspect the 'Me' in 'Mean' is supposed to be the end of the above sentence)
It's "tu hermano." This is your close friend's brother, not your boss' brother. Your boss' brother is "su hermano."
él es tu hermano
est-ce que tu veux me rencontrer, veux-tu me rencontrer, veux-tu qu'on se rencontre ?
Would you like to sleep with me
en tu ano
Can you help your brother?