It is a logical assumption to say that she may make a fatal mistake in subsequent acts, allowing the townspeople to look into her true self which may in turn anger them; the end of the virtuous life of Abigail will be grave.

Hi, from the analysis below, can you correct the mistakes, please. (had trouble with 'to say that...' Unsure what it modifies etc)

I especially need help with the parts with question marks. Thanks a lot.

It is a logical assumption...=independent clause #1

;the end of the virtuous life of Abigail will be grave=independent clause #2

Independent clause #1

It=subject/dummy it

is=linking verb/verb to be

a=determiner/indefinite article

logical=adjective/pre modifier

assumption=noun/subject complement

to say=infinitive/adjectival post modifier of assumption???

that she may make a fatal mistake in subsequent acts=noun clause/???I don't know what its noun function is...???

allowing the townspeople to look into her true self= present participle phrase/modifying 'she'

which may in turn anger them=relative clause/modifying self???

independent clause #2

The end of the virtuous life=noun phrase

will=modal auxillary

be=linking verb/verb to be

grave=predicate adjective(complement)/adjective
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Comments  (Page 3) 

I thought it was modifying 'inern' too. But I realised the writer has a comma preceding the particple phrase, which generally implies that the word it mmodifies is further back in the sentence. But the person who wrote this may not know this, so I'd say you are right.

Taking for ever to make up their minds, John and his wife, with little apprehension, care, or dignity, commited insurance fraud.

In bold: Function: Subject. Head of phrase is John and wife

But it is a noun phrase. There is nothing else you can call these group of words.

A noun phrase exists for analytical purposes.
I don't think working from big to small is necessarily the only way to approach the task. It sometimes leads to errors in parsing the sentence. I too would begin with the large picture, but from a semantic point of view. I like to know what the sentence is trying to tell me.

But after that, I look for the verb - the simple predicate, not the complete predicate. To me, this is the smallest and most important element.

This may lead to the conclusion that there is more than one verb, and they may appear to have equal status. Only in this case would I attempt to break up the sentence as an early strategy. (I suppose we could make a flow chart for this approach, if we were so inclined.)

I would next try to find an actor, bearing in mind that we may have a passive verb. Again, I would try to isolate the simple subject, not the complete subject. And again, I may find more than one, of equal status.

Hopefully, I'll have one simple verb and one simple subject. In this case, the rest is usually easy. But in the case of multiples, I must next decide if I'm dealing with a compound subject/predicate or a compound sentence.

In the sentence you have proposed, we have a single verb, "committed," and a compound subject, "John"; "wife." To me, this is the essence of the sentence.

If someone were to ask me, "But what is the complete subject?" I would happily give them your noun phrase.

Absent that, I'd note the conjunction and the possessive pronoun/adjective, and ask myself what the prepositional phrase modifies (adjectival - subject, or adverbial - verb). (Just between you and me, I'd say it modifies the verb, but I suppose it's arguable.)

I think this is a case where jumping to stick the first nine words in a group and to give them a name, possibly leads to an error in assigning the function of the prepositional phrase.

Incidently, I've only recently learned about "heading the phrase," and thus far I've thought of it in a nominal rather than a functional sense. That is, a "participial phrase" is so named because it's "headed" by a participle. Therefore, I should think only one word may be said to "head" the phrase. If you wish to identify a phrase functionally (eg., adjectival, I think it's irrelevant to say what word heads it.) I may have this all wrong.
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