Breakdown of Wszyscy wiedzą, że musisz zorganizować katering i zadbać o napoje.
i
and
wiedzieć
to know
wszyscy
everyone / all (the)
musieć
to have to
Questions & Answers about Wszyscy wiedzą, że musisz zorganizować katering i zadbać o napoje.
Why does this sentence use wszyscy instead of wszystko or wszystkie?
Wszyscy means "everyone" and is used for groups of people (specifically, mixed-gender or all-male groups). Wszystko means "everything" (for objects or concepts). Wszystkie also means "all" or "everyone", but it is only used if the group is entirely female, animals, or objects. Since "everyone" here refers to people in general, the masculine personal form wszyscy is required.
Why is the verb wiedzą in the plural? In English we say "everyone knows" (singular).
In Polish, wszyscy is a plural pronoun (it literally translates closer to "all people"). Therefore, it always takes a third-person plural verb. Instead of a singular verb like in English, Polish requires the plural wiedzą (they know).
Why is there an o before napoje?
The verb zadbać (to take care of, to see to) requires the preposition o followed by a noun in the Accusative case. This is just a set phrase you have to memorize: zadbać o coś (to take care of something). Here, napoje is the Accusative plural of napój (drink).
Why do we use the perfective verbs zorganizować and zadbać here instead of their imperfective forms?