Breakdown of Kommst du aus Deutschland?
du
you (informal singular)
Deutschland
Germany
kommen
to come
aus
from / out of (made of)
Questions & Answers about Kommst du aus Deutschland?
Why does the verb end in "-st" (kommst)?
Because the subject is the informal "you" (du). In German, verbs change their endings based on who is doing the action. When you use du, the verb almost always takes an -st ending. You start with the dictionary form (kommen), drop the -en, and add -st to get kommst.
How would I ask this formally if I were speaking to a stranger?
You would say, Kommen Sie aus Deutschland? When using the formal "you" (Sie), the verb usually keeps its dictionary -en ending, so it stays as kommen.
Where is the word for "do" in this sentence?
German doesn't use "do" to make questions! Instead of saying "Do you come?", German simply swaps the verb and the subject to ask "Come you?" (Kommst du?). Any time you see a sentence starting with a verb like this, it's a yes/no question.
Why do we use aus for "from" here?
The word aus literally means "out of." It is the standard preposition used in German to express where you are originally from (like your country, city, or hometown). So, Germans literally say they come "out of" Germany.