The car was traveling at over 70 miles an hour.

[Shie0605]

The car was traveling at over 70 miles an hour.

I found the sentence in a dictionary. ( "快譯通 MD8100" )

70 miles and an hour are nouns.
What is their grammatical function?

 

[emsr2d2]

The car was traveling at over 70 miles an hour.

I found the sentence in a dictionary. ("快譯通 MD8100")

70 miles and an hour are nouns.
What is their grammatical function?

"70 miles" isn't a noun. "Miles" is a plural noun. "70" is a number. "Hour" is a noun. "An" is an article.

I don't know what you mean by "grammatical function"? Do you understand what the sentence means?

 

[Shie0605]

Is "an hour" as an adjective to modify "70 miles"?
Thanks.

 

[Tarheel]

Is "an hour" USED as an adjective to modify "70 miles"?
Thanks.

If it helps you understand the sentence then yes, it is.

 

[emsr2d2]

Is "an hour" used as an adjective to modify "70 miles"?
Thanks.