What part of speech is half?

"Half" can be several parts of speech, depending on how it's used in a sentence:

* Adjective: Describing a quantity or amount.

* Example: "I ate half the pizza."

* Noun: Referring to one of two equal parts.

* Example: "I'll take the left half."

* Adverb: Modifying a verb, adjective, or another adverb.

* Example: "The door was half open."

* Determiner: Used before a noun to indicate a specific quantity.

* Example: "Half a cup of flour."

Let me know if you have a specific sentence in mind, and I can tell you which part of speech "half" is acting as in that context.