How do you say do you in French?

With great difficulty. French does not have compound present tenses. You can say 'You speak', but not 'You are speaking' or 'You do speak'; and therefore, the question form is 'Speak you?' but not 'Do you speak?' or 'Are you speaking?' To make a question i French, either a) reverse verb and pronoun; Tu parles > Parles-tu? or (especially when the subject is not a pronoun) put 'Est-ce que...' on the front: La dame parle > est-ce que la dame parle? Est-ce qu'elle parle?