The word “all” serves as different parts of speech depending on its usage in a sentence. Most commonly, it functions as a determiner, pronoun, or adverb.
As a determiner, “all” is used before nouns to indicate the total quantity or entirety of something. For example, in the sentence, “All children deserve an education,” it specifies that every child, without exception, is included.
As a pronoun, “all” can stand alone and refers to a group or a totality. For instance, in the phrase, “All are welcome to join,” it encompasses everyone in a particular context.
In its use as an adverb, “all” modifies adjectives or other adverbs. For example, in the sentence, “She is all ready for the trip,” it emphasizes the completeness of her readiness.
Overall, understanding the context in which “all” is used is essential to identify its function in a sentence.