Q.
Is "six o'clock" an adverb in the following sentence? Is "about six o'clock" a prepositional phrase?
About six o'clock, I ate supper.
A.
In your sentence "six o'clock" is a noun, the name of a thing (a time). "About six o'clock" is a prepositional phrase. The phrase functions as an adverb modifying the verb "ate."
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