Questions & Answers about On musi rozwiązać ten problem.
What does On mean, and why is it capitalized here?
On is the third-person singular pronoun meaning he. It's capitalized because it's the first word of the sentence. In any other position you'd write on.
What is the role of musi in this sentence?
Musi is the third-person singular present tense of the modal verb musieć, meaning must or have to. It expresses that he is obliged or required to do something.
Why does musi come before the main verb rozwiązać?
In Polish, modal verbs are conjugated and placed before an infinitive, which carries the main action. Therefore we say musi rozwiązać, not rozwiązać musi.
Why is rozwiązać used instead of rozwiązywać?
Rozwiązać is the perfective infinitive, indicating a completed action of solving to its end. Rozwiązywać is the imperfective infinitive and would suggest an ongoing or repeated process, which does not fit when you mean must solve the problem fully.
What case is ten problem in and why?