How to judge predicative clauses

Judging predicative clauses is as follows:

Composition of predicative clauses: if the clause is declarative, add that directly; If the clause is a special question: the special question is reserved directly, and the following sentences become declarative sentence order; If the clause is a general question: first change the general question into a declarative sentence order, and then add weather or if before it;

China is no longer the China it used to be.

The question is who is responsible for what happened.

The usage of the leading words of predicative clauses;

1.that leading predicative clause

( 1)? That? It only plays a connecting role in clauses and has no practical significance. It does not constitute any component in the sentence and cannot be omitted.

Example:

What is my opinion? That? It's getting better.

② In the table? Advice, persuasion, command? In the predicative clauses after the nouns idea, suggestion, request and proposal, the predicate verb is "should+ verb prototype", and should can be omitted.

Example: What do I suggest? That? we? Should we start? Tomorrow morning.

2.？ Is it? It means "whether" in the predicative clause, but it doesn't act as a component of the sentence. If cannot guide predicative clauses.

Example: the question is? Is it? It's worth doing.

3.？ What? Act as subject, object or predicative in predicative clauses, indicating what it is, what it is or what it is (people or things).

Example: the question is? What? Caused an accident. ?

4.？ Who is it? Act as subject, object or predicative in predicative clauses, indicating "who".

Example: The question is? Who is it? Can do the work.

5.？ Which one? When guiding predicative clauses, they are often used as attributes and predicates. Which one, which one.

I read about it in a book, but I don't know what it is. Know it, right? Which one? Yes

6.as if, as if leads to predicative clauses, meaning "as if". The copula verbs in sentences are often used as be, look, apparent, seem, sound, etc.

Example: It? Does it look like? It will rain.

What does the young man with long hair look like? It seems that he is a girl. (subjunctive mood)

7.？ When the subject of the main clause is reason, or why-led clause, use the predicative clause related to it. That? Guide, but not for reasons. Because when introducing predicative clauses, they can only be used in It/That/This is /was. Because ... in sentence patterns.

Example: Why? Am I late? What is that? I missed the train.

I am late. ? This is because? I missed the train.

8.？ When the subject, object and predicate in the predicative clause are available, but the interrogative meaning still needs to be expressed, it can be judged that there is no adverbial in the sentence, which is often guided by the corresponding special interrogative words, such as why, when, where and how? Wait a minute.

Example: What is this? How come? He did it.

What is that? Why? The two brothers want to make a bet.

That is. Why? We have given you the letter.