Breakdown of Мой брат живёт в квартире номер одиннадцать.
брат
brother
мой
my (мой, моя, моё) / mine
квартира
apartment
жить
to live
Questions & Answers about Мой брат живёт в квартире номер одиннадцать.
Why doesn't одиннадцать change its ending to match the Prepositional case of в квартире?
When a number is used as a name or label (like an apartment number, bus route, or telephone number), it acts as a bare numeral and stays in its basic dictionary form (Nominative case). You don't need to make it match the case of the noun it belongs to.
Why are there two н's in the middle of одиннадцать?
Historically, Russian teen numbers were formed by saying the digit, then на (on), then десять (ten). Eleven was один на десять (one on ten). Over time, this merged into one word, keeping the н from один and the н from на. You just pronounce it as a slightly longer "n" sound.
Why do we use в квартире (Prepositional case) instead of в квартиру (Accusative case) here?
We use the Prepositional case (в квартире) because the verb живёт (lives) describes a fixed location. We only use the Accusative case (в квартиру) to show motion or direction, like if the brother was moving into the apartment.
I know the dictionary form of the verb 'to live' is жить. Where does the в in живёт come from?