NOUN CLAUSE

In the dialog, the noun clause functions as an object or subject.
There are some kinds of noun clauses, such as the following :



 1. Noun clauses which begin with that.
    a. As a subject.
        Here, we cannot omit the word 'that'
    b. As an object.
        Here, we can omit the word 'that'

 2. Noun clauses which begin with whether/if.
    a. As a subject.
        Whether the man is tired or not is obvious.
    b. As an object
        As an object, the noun clause is formed from a yes/no question
 
3. Noun clauses which begin with a question word.
    a. As a subject.
        When the noun clause becomes a subject, the verb is singular.
    b. As an object