主语从句强调句讲解练习

主语从句

1.定义：用作主语的从句叫做主语从句。

2.引导主语从句的关联词有三类：

(1)从属连词that、whether。如:

如：That they were in truth sisters was clear from the facial resemblance between them. 很明显，她们确蔓亲姐妹，她们的脸型很相似。

Whether he'll come here isiTt clear.他是否会来这里还不清楚。

从属连词：that, whether 等・

that引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。由whether及其他连词引导的主语从句放在句首，句后都可。IF只能放在句中。

(2)(特殊疑问词)连接代词who, whom? whose, what, which, whoever, whatever, whichever

如：

__ which _____ watch was lost is unknown.

____ w hat ____ she did is not yet known.她干了什么尚不清楚。—which side will win is not clear.

Whoever comes is welcome.不论谁来都欢迎。

(3)(特殊疑问词)连接畐词where, when, how, why, wherever, whenever, however。he did it

remains a mvsterv.

When they will start Is not known yet.

How this happened is not clear to anyone.这事怎样发生的，谁也不清楚Wherever vou are is mv home ・—mv onlv home.

你所在的丘何地方就富我的家…•我旌一矗家。

1.主语从句能用it作形式上的主语。常以it作形式主语的句型有：

A.It+be+形容词(obvious，true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that 从句。如：

It is certain that she will do well in her exam.毫无疑问她考试成绩会很好。造句：很可能他把一切都告诉她了。

B.It+be+名词词组(no wonder, an honour, a good tiling, a pity, no surprise, etc.)+that 从句o如：Ifs no surprise that our team should have won the game.我们没贏这场比赛真意外。

C.It+be+过去分词(said, reported^ thought, expected, decided, announced, arranged, etcj+that 从句。如：

It is reported that China has sent another man-made earth satellite into orbit. 据报道中国又成功地发射了一颗人造地球卫星。

D.It+seem, happen等不及物动词及短语+that从句。如：

It seems that Alice is not coining to the party at alL Alice 似乎不来参加晚会。

It happened that I was out that day.碰巧我那天外出了。

E.It+doesn5t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如：

It doesift matter whether she will come or not.她是否来这无关紧要。

It makes no difference where we shall have the meeting.我们在哪里开会毫无区别。

F.当that引导的主语从句出现在疑问句中时，要以It作形式主语，而把主语从句后置。如:Is it

Whoever comes will be welcome. (whoever=the person who)

A. What is it that

B. What it is that

C. How is true that the scientist will give us a lecture next week?下周那位科学家将给我们作报告是真的吗？

2.注意连接代词whoever，whatever whichever等引导主语从句的含义

A. What is it that

B. What it is that

C. How is it that

D. How it is that

5.It was with great joy ________ he received the news that his lost daughter had been found. （2004 福建卷）

A because

B which

C since

D that

6.An awful accident _________ ，however, occur the other day. （2000上海卷）

A. does

B. did

C. has to

D. had to

7.It was not until she got home _________ Jennifer realized she

had lost her keys. （2006 全国II 卷）

A. when

B. that

C. where

D. before & It was ______ black home after the experiment. （2004 湖北卷）

A・ not until midnight did he go B・until midnight that he didn't go

C・ not until midnight that he went D. until midnight when he didn^t go

9. —________ that he managed to get the information?

—Oh, a friend of his helped him. （2005 山东卷）

A. Where was it

B. What was it

C. How was

D. Why was it