mais tu veux ... means 'but you want...' in English.
no but if you want
Tu veux means 'you want' in English.
mais ça va maintenant si tu veux : "but now that's all fine if you want / if you want to"
"veux-tu m'épouser ?" means "do you want to marry me?" in English.
It means, "if you want".
je t'adore, veux-tu m'épouser means 'I love you, do you want to marry me?' in English.
"désolé, mais qui es-tu ?" is translated "Sorry, but who are you?" in English.
to want. "veux" comes from the infinitive "vouloir", and has the ending used when referring to "je" (me) or "tu" (you)
"Do you want or don't you?"
"mais tu verras" means "but you will see".
It can mean: ...do you want to give (it) back to him... ...do you want to turn him into...
quand tu veux means 'whenever you want' in French.