* Noun: This is the most common usage, referring to an activity that requires effort or skill.
* Example: "I have a lot of work to do today."
* Verb: This means to perform labor or to function or operate.
* Example: "The engine works perfectly."
* Adjective: This is less common and means relating to or intended for work.
* Example: "They have a work table in the garage."
Let me know if you'd like examples of any particular usage!