What part of speech is the word along?

The word "along" can be a few different parts of speech depending on its use in a sentence:

* Preposition: This is the most common use, showing direction, location, or movement.

* Example: "We walked along the beach."

* Adverb: This is used to modify a verb, adjective, or another adverb, often indicating direction, manner, or time.

* Example: "The car drove along at a steady pace."

* Interjection: This is less common, expressing surprise or agreement.

* Example: "Along! I didn't know you were coming."

So, to determine the part of speech, you need to look at how it's used in the sentence.