What part of speech is the word as?

The word "as" can be several parts of speech, depending on its function in a sentence. Here are the most common:

1. Preposition: This is the most common use. It shows a relationship between words, similar to "like," "in," or "at."

* Example: "He worked as a carpenter."

2. Conjunction: It can connect words, phrases, or clauses, similar to "like," "so," or "because."

* Example: "She sings as beautifully as her sister."

3. Adverb: It can modify verbs, adjectives, or other adverbs, usually expressing similarity or degree.

* Example: "The flowers smell as sweet as roses."

4. Pronoun: In rare cases, "as" can stand in for a noun phrase, usually in a relative clause.

* Example: "We saw the same movie as they did."

To determine the specific part of speech for "as" in a sentence, you need to consider its context and how it functions within the sentence.