高考英语考点 71主语从句

考点七十一主语从句

主语从句是在复合句中担任主语的句子。其特点有：

（1）引导词：

从属连词that, whether;

连接代词who, what, which;

whoever, whatever, whichever;

连接副词when, where, how和why。

（2）语序：陈述句语序

（3）在主语从句中只能用whether,不能用if

That he will win the match is certain.

It is certain that he will win the match.

1. 一般来说主语从句都是放在句首，但有时为了使句子保持平衡，避免"头重脚轻",常用it 作形式主语，从而把主语从句放后面。常以it作形式主语的句型有：

①It is＋形容词＋that...

☞It is certain that she will do well in her exam．

毫无疑问她考试成绩会很好。

②It is＋名词词组(no wonder, an honour, a good thing, a pity, no surprise, common knowledge, a surprise, a fact, etc.)＋that...

☞It’s a pity that we can’t go.

很遗憾我们不能去。

③It is＋过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)＋that...

☞It has been suggested that much should be done to prevent the river from being polluted.

有人建议应做更多的工作阻止河流遭受污染。

④It appears/seems that...|It happens that...|It occurred to me that...|It turned out that...

☞It turned out that nobody remembered the address.

结果发现没人记得这地址。

⑤It doesn’t m atter that...|It makes no difference that...

☞It doesn’t matter whether she will come or not．

她是否来这无关紧要。

2. 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。

☞Does it matter much that they will not come tomorrow?

他们明天不来很要紧吗？

3. 当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。

☞How strange it is that the children are so quiet!

孩子们这么安静真奇怪！

单句语法改错

①What will they do next has not been decided.

②No matter who says that is a liar.

③That she says will not make any difference to our arrangements.

④What we need is reference books.

⑤If we will go there tomorrow depends on the weather.

【2017·北京】Every year, ____makes the most beautiful kite will win a prize in the Kite Festival.

A. whatever

B. whoever

C. whomever

D. whichever

【答案】B

【解析】句意：每年，任何一个做出最漂亮的风筝的人将会在风筝节获奖。空格所在部分是主语从句，缺少主语，用连接代词，根据意思可知是人获奖。

1.【2016·北京】24. Your support is important to our work. ________ you can do helps.

A. However

B. Whoever

C. Whatever

D. Wherever

【答案】C

【解析】：考查主语从句。do后缺少宾语，表示任何事情。

3.【2016·江苏】21.It is often the case ______anything is possible for those who hang on to hope.

A. why

B. what

C. as

D. that

【答案】D

【解析】：考查主语从句。It是形式主语，真正的主语是连接词that引导的主语从句，that 不作任何成分，只起连接作用，不能省略。

一单句语法填空

1._____ we understand things has a lot to do with what we feel.

2._____ Li Bai, a great Chinese poet, was born is known to the public, but some won’t accept it.