Breakdown of Daję słowo, że wrócę na czas.
na
on, at / to (motion toward) / for (a meal) / for (waiting for)
czas
time
że
that
wrócić
to return, to come back (perfective)
Questions & Answers about Daję słowo, że wrócę na czas.
Why doesn't the sentence say Daję moje słowo for "I give my word"?
In Polish, possessive pronouns like moje are usually left out when context makes it obvious who the object belongs to. Since you are the one doing the giving (daję), it is already perfectly clear that it is your own word.
Why is the first verb daję (imperfective) but the second verb is wrócę (perfective)?
Daję is imperfective because it is happening right now in the present tense: you are actively giving your word in this exact moment. Wrócę is a perfective verb, and in Polish, when you conjugate a perfective verb using present-tense endings, it automatically creates the future tense ("I will return").
Is the comma before że strictly necessary?
Yes! Unlike English, where you can often drop the comma or even the word "that" completely (as in "I give my word I will be back"), Polish grammar strictly requires a comma before the conjunction że.
Is na czas the standard way to say "on time"?
Yes, na czas is the fixed, everyday phrase for being punctual or doing something by a deadline. It uses the preposition na followed by the accusative case, though the masculine noun czas looks exactly the same here as it does in its basic dictionary form.