Odpovědní arch musíme odevzdat moderátorovi.

must/to have to

Breakdown of Odpovědní arch musíme odevzdat moderátorovi.

• moderátor: the host; quizmaster
• odpovědní arch: the answer sheet
• odevzdat: to submit; hand in

Questions & Answers about Odpovědní arch musíme odevzdat moderátorovi.

Does odpovědní here mean responsible?

Not in this phrase. In odpovědní arch, odpovědní means something like answer- or for answers, so the whole expression means answer sheet.

This is a set expression used in tests, competitions, and quizzes. So you should learn odpovědní arch as one phrase, not as responsible sheet.

In other contexts, forms of odpovědný can of course mean responsible, for example odpovědní lidé = responsible people.

What case is odpovědní arch in?

It is in the accusative singular, because it is the direct object of odevzdat: it is the thing being handed in.

• co musíme odevzdat? → odpovědní arch

The noun arch is masculine inanimate, and for masculine inanimate nouns the accusative often looks the same as the nominative. That is why arch does not change form here.

Why does odpovědní not change form here?

Because it agrees with arch in gender, number, and case, and in this combination the form happens to stay the same.

So here you have:

• arch = masculine inanimate singular
• case = accusative
• odpovědní matches it

For this type of adjective, the nominative and accusative singular can look identical, so odpovědní arch stays odpovědní arch.