Nauczyciel mówi, że zdanie powinno być proste, ale nie nudne.

to be

Breakdown of Nauczyciel mówi, że zdanie powinno być proste, ale nie nudne.

• ale: but
• nie: not
• że: that

Questions & Answers about Nauczyciel mówi, że zdanie powinno być proste, ale nie nudne.

What is the function of że in “Nauczyciel mówi, że zdanie powinno być proste, ale nie nudne.” Can you omit it like English “that”?

In Polish że is mandatory to introduce a subordinate (reported‐speech) clause. It corresponds to English that, but unlike English you cannot drop it. Without że the sentence would be ungrammatical.

Why is zdanie in the nominative case here?

Because in the subordinate clause “…że zdanie powinno być…”, zdanie is the subject of the verb phrase powinno być, so it stays in the nominative.

Why is powinno used instead of musi?

powinno (from powinien) expresses should/ought to, a recommendation or softer obligation. musi (from musieć) means must/have to, a stronger necessity.

Why does powinno appear in its neuter singular form here?

Because it agrees with the subject zdanie, which is a neuter singular noun. In constructions like powinno być + adjective, the modal form agrees in gender and number with that subject.

Why are the adjectives proste and also in the neuter singular nominative?