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In "Comment tu t'appelles ?" there is also two "tu". The "t'" is also a "tu".

"s'appeller" is a pronominal verb. So we need to put a pronoun.

"Comment vous vous appelez ?" or "Comment vous appelez-vous ?" is like "How do you call youyourself ?" in english. And as you can see, in this question, you can find two "you".

In "Comment tu t'appelles ?" there is also two "tu". The "t'" is also a "tu".

"s'appeller" is a pronominal verb. So we need to put a pronoun.

"Comment vous vous appelez ?" or "Comment vous appelez-vous ?" is like "How do you call you ?" in english. And as you can see, in this question, you can find two "you".

In "Comment tu t'appelles ?" there is also two "tu". The "t'" is also a "tu".

"s'appeller" is a pronominal verb. So we need to put a pronoun.

"Comment vous vous appelez ?" or "Comment vous appelez-vous ?" is like "How do you call yourself ?" in english. And as you can see, in this question, you can find two "you".

Source Link

In "Comment tu t'appelles ?" there is also two "tu". The "t'" is also a "tu".

"s'appeller" is a pronominal verb. So we need to put a pronoun.

"Comment vous vous appelez ?" or "Comment vous appelez-vous ?" is like "How do you call you ?" in english. And as you can see, in this question, you can find two "you".