not decided.
b. Where he was born is still a puzzle.
c. Why he was late for school is not clear.
III. The Predicative Clause
The Predicative Clause is used as a predicative in a complex sentence.
1. 由从属连词引导( that, whether )
a. The truth is that he has never been to the country.
b. The question is whether we can
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finish the work in time.
c. The reason why he was absent was that he was ill.
d. He was absent. It was because he was ill.
e. My suggestion is that you should write a letter to cheer him up.
Note: 表语从句中“是否”只能用 whether,不用 if ；that 没有意义，但不能省略。
2. 由连接代词who, whom, whose, what, which引导
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a. The most important thing is whom our education must serve.
b. The school is not what it used to be.
c. What I want to know is which dictionary I should buy.
d. What we want to know is who will be in charge of the factory.
3. 由连接副词 when, where, why, how 等引导
a. What I want to know is when we’ll leave for Beijing.
b. This is where he once lived.
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c. That’s why he got up so late this morning.
d. That was how they won the football match.
Note: 表语从句还可由 as if / though引导
a. She looks as if she were very tired. b. It seems as if it is going to rain.
IV. The Appositive Clause 1. The Appositive Clause : The
Appositive Clause is a noun clause , which illustrates the meaning of the noun , such as fact , idea , news ,
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