A grammarian about whom I’m reading talks of the Non-Patticipial Adjective Plus Modifier. This is an adjective that comes at the end of the sentence, followed by an adverbial, all of which modifies the subject.

In this sentence, however, the adjective is followed by a noun/complement clause:

In 1939, The United States began to assist the British in their struggle against Germany, fully aware that it faced another world war.

Seeing as it is a noun clause rather than an adverbial, I’m unsure if this can be classified as what the grammarian above discusses. What would you call this phrase in bold? (a complex adjective phrase, perhaps?)

Also, I was wondering what place this noun clause has in the sentence? That is,  is it a subject, object, or complement for example.

Thanks for your time, guys.

a complex adjective phrase, perhaps?

Yes, that seems a good description.

Also, I was wondering what place this noun clause has in the sentence? That is, is it a subject, object, or complement for example.

Interesting question.  You could think of it as the object of the implied preposition ‘of’ after ‘aware’.  (In Spanish you would have to insert an ‘of’ here - “aware of that it faced….”)  Alternatively, you could regard it as an adverbial clause modifying ‘aware’.

It will be interesting to hear saparris’s view.

Thanks, ACB.

I was hoping you would say that it is adverbial both because I thought it may have been this and because this would match the explanation the grammarian was talking of with regard to The Non-Patticipial Adjective Plus Modifier; I suppose it has to be an adverbial as adverbs are the only part of speech capable of modifying an adjective…

As an aside, interestingly enough, this constuction in bold is a free modifier in the terminal position, which comments on the subject of the clause, and can only be used if it has an adverbial element to it. In other words, it cannot exist at the end of a sentence if only an adjective is used:

“Technical writing that is developed to its potential is truly significant, worthy.”  — Incorrect

He states that these adjective structures have to have sufficient syntatic weight to justify themselves in the terminal position.

Technical writing that is developed to its potential is truly significant, worfhy of being read by virtue of its engaging expression.—-Correct

Thanks

Yes, it seems reasonable to regard it as adverbial.

I can think of some examples where one or more terminal adjectives can be used without an adverbial phrase, e.g:

1. He jumped up, triumphant.

2. I finally got home at midnight, cold and angry.

3. The president left office the following January, sadder but wiser.

In all these cases the adjective or combination of adjectives has enough weight to stand on its own at the end.