What part of speech is seeing?

"Seeing" can be a few different parts of speech depending on how it's used in a sentence. Here's a breakdown:

* Verb (present participle): This is the most common usage. It describes an action happening now.

* Example: "I am seeing the doctor tomorrow."

* Gerund: It can act as a noun, referring to the act of seeing.

* Example: "Seeing is believing."

* Adjective: It can modify a noun, meaning relating to sight.

* Example: "He has seeing eyes." (This is somewhat archaic usage)

To determine the part of speech, you need to analyze how it functions in the sentence.