5、The fact is that I earned my passage by working as an unpaid hand. ( Unit 3, Book3)

4、What is even more important is that as the earth cooled down, water began to appear on its surface. ( Unit 4, Book3)

3、The earth became so violent that it was not clear whether the shape would last or not.

( Unit 4, Book3)

2、I wonder if you’d mind us asking a few questions? ( Unit 3, Book3)

1、Oliver believes that with a million pound bank note a man could survive a month in London. ( Unit 3 ,Book3)

4、同位语从句

作句子同位语的从句叫同位语从句，同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导，不能省略。可用于同位语从句的名词有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。

The news that we won the game is exciting.　我们赢得这场比赛的消息令人激动。 　

I have no idea when he will come back home. 我不知道他什么时候回来。 　

The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。

注意：当主语是reason时，表语从句要用that引导而不是because。

The reason why he was late was that he missed the train by one minute this morning.

(活学活用)请说出下面句子中画线部分的连接词和该从句在句子中充当的成分。

3、表语从句：作句子表语的从句叫表语从句。引导表语从句的连词与引导主语从句的连词大致一样，表语从句位于连系动词后，有时用as if引导。其基本结构为：

主语 + 系动词(be/seem/remain/look/appear,etc)+表语从句。

The fact is that we have lost the game. 事实是我们已经输了这场比赛。 　　

This is where our problem lies. 这就是我们的问题所在。 　

That is why he didn’t come to the meeting. 那就是他为什么不到会的原因。 　

It looks as if it is going to rain. 看上去天要下雨了。

2、宾语从句：作句子宾语的从句叫宾语从句。通常由从属连词that，whether, if和连接代词what who，which，whatever，whoever以及连接副词how，when，where，why等词引导。

He told us that he felt better.

I doubt whether he will succeed.

She wondered what he had done.

Tom wanted to know where the meeting would be held.

在句子中起名词作用的句子叫名词性从句 (Noun Clauses)。 名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句和同位语从句。名词性从句的引导词有连接词(5个)：that、if/whether(是否)，as though和 as if. 连接代词(9个)：what, whatever, who, whoever, whom, whomever, whose, which, whichever. 　连接副词(7个)：when, where, how, why, whenever, wherever, however.

1、主语从句：作句子主语的从句叫主语从句。主语从句通常由从属连词that，whether和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。that在句中无词义，只起连接作用，不能省略；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。

That she will do well in her exam is certain.　 她将考得好是肯定的。

What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。 　

Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。 　

Where the English evening will be held has not yet been announced.

英语晚会将在哪里举行还没有宣布。 　

27．已知：如图，直角梯形ABCD中，AD∥BC，A=90°，AB=6，BC=8，AD=14．

　　 E为AB上一点，BE=2，点F在BC边上运动，以FE为一边作菱形FEHG，使点H

　　 落在AD边上，点G落在梯形ABCD内或其边上．若BF=x，△FCG的面积为y．

　 　(1)当x=_________ 时，四边形FEHG为正方形；

　　 (2)求y与x的函数关系式；(不要求写出自变量的取值范围)

　　 (3)在备用图中分别画出△FCG的面积取得最大值和最小值时相应的图形(不要求尺规作图，不要求写画法)，并求△FCG面积的最大值和最小值；(计算过程可简要书写)

(4)△FOG的面积由最大值变到最小值时，点G运动的路线长为______________。

解：(1)答：当x=___________时，四边形FEHG为正方形．

(2)　

(3)

(4)答：△FCG的面积由最大值变到最小值时，点G运动的路线长为___________。