* Preposition: This is the most common usage. It indicates direction, position, or movement.
* Example: "We walked along the river."
* Adverb: It modifies a verb, adjective, or another adverb, indicating direction or manner.
* Example: "The car drove along." (modifies the verb "drove")
* Adjective: Less common, but possible in some contexts, it describes a noun.
* Example: "The along road was bumpy." (Describes the noun "road")
To determine the part of speech for "along" in a particular sentence, look at how it is used in the context.