内容正文:
2023届高三英语一轮复习语法教学案
专题二:主语从句 执笔人:李雨欣
1、 主语从句的定义和功能
用作主语的从句称为主语从句(即一个句子作主语);由定义可知,主语从句在主从复合句中作主语。
1.EG.(1)What struck me was that they have all suffered a lot.
(2) Whether they would support us was a problem.
(3) That you are coming to London is the best news I have heard this long time.
(4) When we arrive doesn’t matter.
(5) What you said is true.
(6) Whom we must study for is a question of great importance.
2.找出下列句子中的主语从句及其引导词,并且指出引导词是否充当成分,充当什么成分。
1. That we shall be late is certain.
2. That the driver could not control his car was obvious.
3. It is certain that we shall be late.
4. It was obvious that the driver could not control his car.
5. Is it possible that they will come tomorrow?
6. It is clear that he was telling the truth.
7. It's probable that we'll be a little late.
8. What caused the accident is a complete mystery.
9. It worried her a bit that her hair was turning grey.
10. It shocked me that Peter didn't tell anybody where he was.
二、引导词
1)that
that在引导主语从句的时候并没有任何含义,而且在从句中也不充当任何成分,但是一般情况下,是不可以省略的(一般只有宾语从句中的that可以省略)
Eg:That you are coming to Beijing is the best news I have heard.
2)whether
whether的含义为“是否”,用来表示从句的不确定性,一般情况下不能换成 if。
Eg:Whether she will come or not is still a question.
3)连接代词
可以引导主语从句的连接代词有 what, whatever, who, whoever, whom, whomever, whose, whosever, which, whichever 等;
这些连接代词保留了自身的含义,因此在主语从句中可以充当主语、宾语、定语、表语等成分,因此也是不可以省略的,例如:
What caused the accident is a completemytery.
When we arrive doesn’t matter.
What you said is true.
Whom we must study for is a question of great importance.
4)连接副词
可以引导主语从句的连接副词有 when, where, how, why 等;
这些连接副词在主语从句中保留了疑问含义,因此也是不可以省略的。
Eg:Why he was late is unknown.
5) it作形式主语替代主语从句
为了避免头重脚轻,大多数主语从句都可以用it代替作形式
It should be tested whether the plan good or not .
a、It+be动词+名词+主语从句
It is a pity that遗憾的是
It seems appears that看来、似乎
It tums out that结果....
It is of great importance that.....非常重要
It doesn't matter that没关系
It strikes/ occurs to me that我突然想到
It is said believed reported that ...结构中主语不可提前。例如:
It was repor