The plane came down later than expected.
In this sentence ,what part of speech is the word down?
It's an adverb, modifying the verb, came. It tells when.
In the sentence, "The plane came down later than expected," the word "down" functions as an adverb. It modifies the verb "came," indicating the direction or manner in which the action of coming occurred.
To identify the part of speech of a word, we need to consider its function in the sentence. In the sentence "The plane came down later than expected," the word "down" is functioning as an adverb.
To determine this, we can analyze how it modifies the verb "came." In this case, "down" is describing the direction of the action. It provides additional information about the manner or circumstance in which the plane came. Adverbs typically modify verbs, adjectives, or other adverbs.
If you'd like to confirm this, you can consult a dictionary or a grammar resource, which will indicate that "down" can be used as an adverb.