Questions & Answers about Zależy mi na tym, żeby dopisać nowy paragraf.
How does the prefix do- change the meaning of the verb pisać in this sentence?
The prefix do- here indicates addition. When attached to pisać (to write), it creates the perfective verb dopisać, which means 'to append' or 'to add in writing'. It perfectly fits the context of adding an extra paragraph to an already existing document.
Why do we need na tym before żeby?
The verb zależeć (to matter / to care about) requires the preposition na followed by the locative case. Because you can't attach a preposition directly to a conjunction like żeby, Polish uses the dummy pronoun to in the locative case (tym) as a structural bridge. Literally, you are saying 'It matters to me on this, that...'.
Why do we use the dative pronoun mi here instead of a nominative subject?
In this specific meaning, zależeć is an impersonal verb. The person who cares is treated as the receiver or experiencer of the situation, so they take the dative case (mi, ci, jemu, etc.). The structure translates much closer to 'It matters to me' rather than 'I care'.
Why is dopisać in the infinitive here instead of a past-tense form like żebym dopisał?