Questions & Answers about Jutro obudzę się wcześnie, żeby zdążyć na pociąg.
Because obudzić się is a perfective verb. In Polish, perfective verbs do not normally have a true present tense; their present-looking forms are used for the future.
So:
- obudzę się = I will wake up
- not I am waking up / I wake up
If you wanted a present or habitual meaning, you would use the imperfective verb budzić się, for example Budzę się wcześnie codziennie.
Się is a very common Polish reflexive marker. With obudzić, it changes the meaning from wake someone up to wake up.
Compare:
- obudzić kogoś = to wake someone
- obudzić się = to wake up
So obudzę się means I will wake up. Without się, the sentence would mean something different.
In neutral Polish word order, się often comes after the finite verb or near the beginning of the clause, but it usually does not stand in first position.
So obudzę się is the most natural order here.
You may sometimes see different placement in other sentences, but for a learner, verb + się is a very good default pattern.