Breakdown of Каждую неделю она покупает дорогую косметику.
она
she / it (for a feminine noun)
покупать
to buy
дорогой
expensive
неделя
week
каждый
every
косметика
the cosmetics
Questions & Answers about Каждую неделю она покупает дорогую косметику.
Why is it каждую неделю instead of the dictionary form каждая неделя?
It is in the Accusative case. To say that something happens 'every' day, week, or month, Russian uses каждый plus the time word in the Accusative case without any preposition. Because неделя is a feminine noun, it becomes каждую неделю.
Why are we using the imperfective verb покупает here?
We use the imperfective verb because the sentence describes a repeating, habitual action. The phrase каждую неделю (every week) is a huge clue that you need an imperfective verb, as perfective verbs are instead used for single, completed actions.
Why does дорогая косметика change to дорогую косметику?
It is the direct object of the sentence, meaning it is the thing being bought. Therefore, it must be in the Accusative case. For feminine singular words, the adjective ending -ая changes to -ую, and the noun ending -а changes to -у.
The English translation says 'cosmetics' (plural). Why is косметику singular?
In Russian, косметика is an uncountable noun that is almost always used in the singular. It functions grammatically just like the English word 'makeup'.
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