Learn German: Wo wohnt Ihr Vater? - Where does your father live?

Vater (father) is a masculine noun. In the nominative case (when it is the subject of the sentence), masculine nouns use the base form of the possessive word without an extra -e on the end. If you were asking about a feminine noun like Mutter (mother), it would be Ihre Mutter.

Why is Ihr capitalized in the middle of the sentence?

The formal word for 'your' (Ihr) is always capitalized in German. This helps you tell it apart from the lowercase ihr, which means 'her' or 'their'. If it were written lowercase as wohnt ihr Vater, the sentence would mean 'Where does her father live?'.

Could I use dein instead of Ihr here?

Yes! You would say Wo wohnt dein Vater? if you were talking to a friend, a child, or someone you know well. Ihr is the formal 'your', which you use when speaking to someone you would address with the formal 'you' (Sie).

Why does the verb end in -t (wohnt)?

The verb must match the subject of the sentence. The subject here is Ihr Vater (your father), which counts as 'he' (third-person singular). Regular verbs like wohnen drop the -en and add a -t for 'he', 'she', and 'it'.