* Verb: This is the most common use. It means to recognize the value or importance of something, or to be grateful for something.
* Example: "I appreciate your help."
* Noun: It can refer to the act of appreciating or valuing something.
* Example: "The painting gained appreciation over time."
* Adjective: It can mean "worthy of appreciation."
* Example: "This is an appreciate painting." (Though this usage is less common.)
To determine the correct part of speech, you need to consider the context of the sentence and how the word is being used.