What part of speech is crossing?

"Crossing" can be a few different parts of speech, depending on how it's used in a sentence:

* Verb: This is the most common use. It describes the action of moving across something.

* Example: "I'm crossing the street."

* Noun: It can refer to the act of crossing itself or a place where crossing is done.

* Example: "The crossing was dangerous."

* Adjective: It can modify a noun, meaning "going across" or "passing through".

* Example: "The crossing guard helped the children."

Let me know the sentence where "crossing" is used, and I can tell you more precisely which part of speech it is in that context!