What type of pronoun is the word it?

The word "it" can be a few different types of pronouns, depending on its context:

* Personal pronoun: This is the most common use. It refers to a previously mentioned noun, and can be used as a subject, object, or possessive.

* Example: "The cat is sleeping. It is very comfortable." (subject)

* Example: "I saw the dog, but it ran away." (object)

* Example: "The car is fast. Its engine is powerful." (possessive)

* Impersonal pronoun: This use refers to something unspecified or unknown.

* Example: "It is raining outside."

* Expletive pronoun: This use acts as a placeholder to begin a sentence, but doesn't have a grammatical function.

* Example: "It is important to study."

To determine the specific type of pronoun "it" is, you need to look at its role in the sentence.