* Verb: This is the most common usage. Example: "I can see the mountains from here."
* Noun: This is less common, but it can be used to refer to the act of seeing. Example: "The see was blocked by the fog."
* Interjection: This is even less common, but it can be used to express surprise. Example: "See! I told you it would work."
So, to determine the part of speech, you need to look at how the word is being used in the context of the sentence.