Diagramming Sentences

Sentence Diagrams

~ One Way of Learning English Grammar ~

The Basics of Sentence Diagramming

~ Sentences 56-60 ~

 
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Sentence 56: They wonder whether they should spend so much money for a car.

That is not the only expletive that can introduce a noun clause; whether, whether or not, and if (in the sense of whether or not) can do so as well. 

Sentence 57: He asked why they had waited for him.

Interrogative adverbs can introduce noun clauses. Here the interrogative adverb is why.

Sentence 58: Your occupational success depends on how hard you work in school.

A noun clause can function also as the object of a preposition. Here the noun clause is introduced by the interrogative adverb how.

Sentence 59: I forgot to tell you whom I saw last summer.

In this sentence, an infinitive phrase has as its direct object a noun clause introduced by the interrogative pronoun whom. Yes, whom, not who; it's a direct object, not a subject.

Sentence 60: They are confident they will succeed.

The noun clause they will succeed is an adverbial objective, i.e., a noun used adverbially. The missing that is replaced in the diagram by an x.
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