Breakdown of Возьми шлем из шкафа и надень.
и
and
шкаф
cabinet / wardrobe
взять
to take / to adopt
из
out of
Questions & Answers about Возьми шлем из шкафа и надень.
Why do we use the perfective verbs возьми and надень here?
Because you are telling someone to successfully complete a specific, one-time action, you need the perfective aspect. If you were telling them not to do these things, you would use the imperfective aspect: не бери (don't take) and не надевай (don't put on).
Wait, what is the infinitive of возьми?
Возьми is the imperative form of взять (to take). This is the perfective partner of the imperfective verb брать. They look completely different, which is a famous exception in Russian!
Why is it надень instead of одень?
The verb надеть means to put on clothing or accessories on yourself, while одеть means to dress someone else, like a child. Since the person is putting the helmet on themselves, надень is the right choice.
Why is there no word for it at the end of the sentence?
In English, we have to say put it on. In Russian, if the object is obvious from the context, like the helmet we just mentioned, it is very natural to just drop the pronoun completely. You do not need to add его at the end.
Why is the ending of шкаф changed to ?