What part of speech is the word can?

The word "can" can be two different parts of speech, depending on its function in a sentence:

* Modal Verb: This is the most common use of "can." It expresses ability, possibility, or permission.

* Example: "I can swim." (ability)

* Example: "It can rain tomorrow." (possibility)

* Example: "You can leave now." (permission)

* Noun: "Can" can also be a noun, referring to a metal container used for storing food or drink.

* Example: "I need a new can opener."

To determine the part of speech, look at the sentence's context and the word's role within it.