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Questions & Answers about Tu estudas aqui?
Why does the verb end in -as here?
Where is the word for "Do" in this question?
Portuguese does not use helper words like "do" or "does" for questions. You just use the exact same word order as a normal statement and add a question mark. When speaking out loud, you simply raise your pitch at the end of the sentence.
Can I leave out the word tu and just say Estudas aqui?
Yes, you can! Because the -as ending on estudas is only ever used with tu, the listener automatically knows who you are talking to. Portuguese speakers very often drop the pronoun for this reason.