主语从句-超全讲解加练习

1、Grammar 主语从句：主语从句： 做主语用的名词性从句，因其在复合句中做主语，做主语用的名词性从句，因其在复合句中做主语， 又称主语从句，引导主语从句的有连词又称主语从句，引导主语从句的有连词that ， whether， 连接代词连接代词who ，what ，which， 连连 接副词接副词when，where， how， why等。等。 1）从属连词从属连词：that， whether等等. that 引导主语从句只起引导作用，本身无实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，但际意义，在主语从句中不充当任何成分，但 不能省略不能省略。 That he w

2、ill win is certain.他肯定会赢。他肯定会赢。 Whether hell come here isnt clear. 他他 是否会来这里还不清楚。是否会来这里还不清楚。 1. That he will refuse this piece of advice is impossible. _ _ 2.That they should like each other is natural. _ *it为形式主语为形式主语 It is natural that they should like each other. It is impossible that he will ref

3、use this piece of advice. 这样就构成了下面一些常用句型这样就构成了下面一些常用句型: 1) It is + n. +从句从句 It is a pity/shame that. 遗憾的是遗憾的是 It is a surprise that令人惊奇的是令人惊奇的是 It is a fact that 是事实是事实 It is common knowledge that 是常识是常识 *_(很遗憾很遗憾)we lost the match. *_(这是事实这是事实)he cheated in the exam. It is a pity that It is a fact

4、that 2) It is + adj. +从句从句 Its certain that 肯定肯定 It is possible that. 很可能很可能 It is unlikely that. 不可能不可能 It is obvious that 很明显很明显 It is necessary important natural. that *_(很可能很可能)she will come back tomorrow. *_(很明显很明显)this measure is effective. +(should) +do It is possible that It is obvious that

5、3) It +不及物动词不及物动词+从句从句 It happened that. 碰巧碰巧 It occurred to me that我突然想起我突然想起 *_(刚好刚好)I came into the office at that time. *_(我突然想起我突然想起)I forget to send the letter. It happened that It occurred to me that It is reported that It is suggested that 2.连接代词连接代词who ，what ，which, whatever, whichever, who

6、ever (Who, whom, which, what可可 以和以和ever构成合成词，和构成合成词，和what一样引导从句，一样引导从句，ever起到起到 强调作用。强调作用。此类主语从句不能用形式主语此类主语从句不能用形式主语it引导引导，它们在，它们在 句子中担任成分，句子中担任成分，不能省略不能省略，语序为陈述语序，语序为陈述语序) What many scientists believe is that the earth is round Who will take part in the meeting has not been decided. Whoever breaks

7、the law will be punished. Which student will win is uncertain. Whatever was said here must be kept secret. 这里说的话都应当保密。这里说的话都应当保密。 Whoever makes mistakes must correct them. 凡犯了错误的人都必须改正凡犯了错误的人都必须改正。 3)连接副词连接副词when，where， how， why等。等。 Why they suddenly disappeared still remains a mystery. When they wi

8、ll leave is not decided. Where she is from is unknown. How we will paint the house has not been decided. 注意注意: 1）主语从句在句首时，必须由连接词引）主语从句在句首时，必须由连接词引 导，不能省略这些连接词；但是如果用导，不能省略这些连接词；但是如果用it 做形式主语，而把主语从句放在句末时，做形式主语，而把主语从句放在句末时， 从属连词从属连词that可以省略。可以省略。 误：误：They should like each other is natural. 正：正：That the

9、y should like each other is natural. 正：正：It is natural (that) they should like each other. 2)如果主语从句放在句首，不能用如果主语从句放在句首，不能用if引引 导，但是如果用导，但是如果用it 做形式主语，而把主做形式主语，而把主 语从句放在句末时，也可以用语从句放在句末时，也可以用if引导引导. 或把或把if 改为改为whether 误：误：If Mary really heard him is really doubtful. 正：正：It was doubtful if Mary really h

10、eard him. 正正: Whether Mary really heard him is really doubtful. Complete the sentences using what, whether, where, when， who, why, how or that. 1.(_ is needed for success) is your hard work. 3.(_ we will go tomorrow )hasnt been decided yet. 2.(_ they will arrive )has been told to the teacher. 4.(_ c

11、an join in the sport meet) is decided by the teacher. 5.(_ it will rain or not) is not clear. What When/How Where/whether Who Whether 主语从句作主语时，谓语动词一般用单数形式。主语从句作主语时，谓语动词一般用单数形式。Conclusion: 规律一、规律一、主语从句一律用陈述语序，主语从句一律用陈述语序， 即主语在前，谓语在后。即主语在前，谓语在后。 正：When he will come is not known. 正：That he will not com

12、e to the meeting this evening is true. 规律二、规律二、连词连词that 在从句中无实际意义，在从句中无实际意义， 但不能省略。但不能省略。 正： Whether the meeting will be put off has not been decided yet. 规律三、规律三、whether 可以引导主语从句，可以引导主语从句， 放在句首，但放在句首，但if不能不能 正：That he will help others is a fact. 规律四、规律四、主语从句中的连词不能重叠使用。主语从句中的连词不能重叠使用。 正：When he will

13、 come is a puzzle. 规律五、规律五、含主语从句的主句谓语动词多用含主语从句的主句谓语动词多用 单数第三人称形式。单数第三人称形式。 规律六、规律六、what 引导的主语从句，可根据引导的主语从句，可根据 表语决定主句动词的单复数形式表语决定主句动词的单复数形式。 It is known to all that the earth turns around the sun. we shall Whether It That you have that is x are are Exercises : Part One: 主语从句单选题主语从句单选题 1. has helped

14、to save the drowning girl is worth praising. A.Who B.The one C.Anyone D.Whoever D 2.It was he said disappointed me. A.what ;that B.that; that C.what;what D.that;what A 3. well go camping tomorrow depends on the weather. A.If B.Whether C.That D.Where B 4. he said at the meeting surprised everybody pr

15、esent. A.What B. That C.The fact D.The matter A 5. was to return to school. A.That really interested him B.What really interested him C.Which really interested him D.That interest him really B 6. makes mistakes must correct them. A.What B.That C.Whoever D.Whatever C 7. your men have been on my land

16、without permission. A.It seems that B.There seems to be C.That seems D.It seems for A 8.It has always puzzled me the old man lied a red silk ribbon on the young tree. A.that B.why C.where D.what B 1._ he made an important speech at the meeting was true. A. That B. Why C. What D. How 2. _well go camp

17、ing tomorrow depends on the weather . A If B Whether C That D Where 3. It worried her a bit _ her hair was turning gray. A.whether B. that C. what D. when 4.What I say and think _ none of your business. A. is B. are C. has D have That What Whether Whether Whoever 请用恰当的主语从句连词填空请用恰当的主语从句连词填空: What ,it

18、 ,that , whether, whoever Correct or not? *When the meeting will be held havent been known yet. . be held hasnt been known yet. Pay attention:主语从句的谓语用主语从句的谓语用单数单数形式形式 10 1.The question is _ the film is interesting. 2._ we shall attend the meeting hasnt been decided yet. 用用whetherif填空填空 whether Wheth

19、er 10 Correct or not? Whether we will. decided yet. Pay attention:放在名词性从句放在名词性从句句首句首，表示，表示 “是否是否”，只能用，只能用whether, 不能用不能用if 10 Correct or not? Pay attention:此主语从句此主语从句缺少成分缺少成分-宾语，宾语， 故用作成分的故用作成分的what来引导，而不用来引导，而不用that。 What she wants to know is. *That she wants to know is when the party will be held . 10 Correct or not? Pay attention:由由that引导的主语从句放在句引导的主语从句放在句 首，首，that 不能省略不能省略。 That he will give up *He will give up his jo