Comparative:
* The weather today is worse than yesterday.
* This movie is worse than the last one I saw.
* My headache is worse than it was before I took the medicine.
Superlative:
* This is the worst day of my life.
* He's the worst driver I know.
* That was the worst meal I've ever had.
Idiomatic Expressions:
* Worse comes to worst, we can always take a taxi.
* Things can always get worse.
* The situation went from bad to worse.
With Adverbs:
* He was much worse after the surgery.
* The situation is significantly worse than it was last year.
* The news is considerably worse than we expected.
Other:
* It's hard to say worse than that.
* I felt worse about it than I had expected.
The specific meaning of "worse" will depend on the context of the sentence.