"Do you come here often?"
Translation:¿Vienes aquí a menudo?
In a statement, sure. In questions, however, it's more correct to write the subject after the verb. http://spanish.about.com/od/sentencestructure/a/sentenceorder.htm
It is fine. (I.e., could perhaps be better, but it's not incorrect.). If it was marked wrong, it was because Duo didn't yet have it in its database.
On the other hand, stressing you in a sentence that's a pickup line sounds tacky, like you've already asked her five girlfriends and they've all turned you down.
Maybe Duo didn't mark OP wrong, maybe Duo didn't want to go out with him. :)
Somewhat, but they both still translate to "here" in English. http://forum.wordreference.com/showthread.php?t=232148
In this case, "do" is an auxiliary verb that doesn't get translated in to Spanish. There are many instances in English where we will write "do" but it doesn't exist in Spanish unless it's being used as a regular verb (e.g. do it!=hazlo!). The most common instances of when the "do/does" isn't translated into Spanish are in questions (as in the sentence above) and in negative sentences (no lo hagas!=don't do it!). http://www.spanishdict.com/translate/do
No, the "a" does not make it more specific, it is a part of the phrase "a menudo" and it is incomplete without it. http://www.wordreference.com/es/translation.asp?tranword=often
It's like in English, we have the word "a lot", you can't just say "I like to come here lot", you would say "I like to come here a lot". Each word ("a" and "lot") has its own meaning when used separately, but when combined it gives it an entirely different meaning. Same concept applies to this phrase, "a" and "menudo" each have their own meanings individually, but when combined together "a menudo"="often". Plus, "menudo", but itself means "small/thin" or "trivial", which makes no sense in this context. http://www.wordreference.com/es/en/translation.asp?spen=menudo
My answer (marked wrong): ¿Viene aquí a menudo usted?
Can anyone tell me if the structure of my sentence is correct? I see that the lesson was looking for the "tu" version of the verb, but I'm curious about using the formal verb, where does the "usted" go (presuming one would use the pronoun)?