Here are some examples:
* Chcę pić. (I want to drink)
* Chciałbym zjeść obiad. (I would like to eat dinner)
* Nie chcę iść do szkoły. (I don't want to go to school)
Chcieć is a verb, so it conjugates depending on the person and tense.
Here are some of the most common conjugations:
* ja chcę (I want)
* ty chcesz (you want)
* on/ona/ono chce (he/she/it wants)
* my chcemy (we want)
* wy chcecie (you want)
* oni/one chcą (they want)
It's also possible to use the word "pragnąć" which has a stronger meaning, closer to "desire" or "long for".