主语从句用法小结

1、主语从句用法小结勉县第二中学高二（ 7）班郭恬指导老师：李艳请观察下列句子 , 注意主语从句的特点。That the earth travels round the sunis a well-known fact.Whether the artist can do it or notis uncertain.Who will act the lead in the playhas not been decided yet.Where the young man has goneis not known.When and where the test will be givenis not ye

2、t decided.【归纳总结】主语从句必须有引导词；主语从句用陈述句语气。引导主语从句的词有：连词 : that, whether；连接代词 : who, whose, whom, whoever, what, which等；连接副词 where, when, whenever, wherever, how, why等。主语从句引导词的选择：1).连接词 : that, whether(1)That he will win is certain.(2) It has been reported that sales of beef in China will increase.(3)Whet

3、herwe shall raise ducks or geese remains to be decided.(4)Whetherhe ll join us in the discussion is of great importance.2) 连接代词 : who, whom, whose, what, which, whoever, whatever, whichever等。(1)It is clearwho is afraid of having a change in land ownership.(2)Whosebag it is cannot be told.(3)WhatIndi

4、a needs is a law to make land ownership fairer.(4)It is not yet decided which cash crop will be produced next year.(5)Whateverhe said was right.(6)Whoevergo there must get ready by 6 o clock.连接副词 : when, where, why, how, how many, how much ,how long, how soon, how often 等。(1)Whenwe ll start tomorrow

5、 will be told soon.(2)Wherewe can buy oxen is something we need to find out.(3)How/ Whenhe came here is not known.(4)Howwe can protect the grain needs to be discussed.(5)How manypeople died from starvation that year will never be known.(6)How oftenhe ll go to see his grandmother depends on the time

6、he can spare.归纳总结：主语从句引导词的选择主要是根据从句的结构和意义来选择。1.如果从句的意义和结构完整，则用that。2.如果从句的意义和结构不完整，则根据从句的意义和结构选择相应的引导词。比较 that / what1.Whathe wants is a book.2.Thathe wants to go there is obvious.3.Whathappened is not clear.4.This is the best TVthatis made in China. 定语从句5.The first museumthathe visited in China was

7、 the History Museum. 定语从句that 和 what 的选用： that 和 what 都可引导主语从句。但是， what 除起连接作用外，还在主语从句中充当成分，可做从句的主语、宾语、或表语。而that在主语从句中不充当任何成分，只起连接作用。翻译和分析下列句子：It is well reported that a storm is coming.It is true that the earth moves around the sun.It is a pity that I missed the train.It doesn t matterwhether he wi

8、ll come or not.It seems that it is going to rain.6. It happened thatthey didn t know my address.归纳：为了使句子保持平衡， 常用 it 来代替主语从句， 而把主语从句放到后面，尤其是连词 that 引导的主语从句常用于此种句式中。常用句型如下：It+ be +名词 + that 从句It+ be + 形容词 + that 从句It+ be + 动词的过去分词 + that 从句It+ be + 不及物动词 + that 从句Its likely/possible/important/necessar

9、y/clear that很可能 /重要的是 /必要的是 /很清楚2.Its known/reported/ thought/said that 据说 /据报道3.It seems/appears/happens that显然、明显、碰巧 .4.Its been announced/declared that已经通知 /宣布Its no wonder that并不奇怪 /无疑 Its a pity/a fact /a common knowledge 众(所周知） / a common saying（俗话说）that主语从句常见错误：下列各句均有一处错误，请改正并分析原因。1. Light tr

10、avels faster than sound is common knowledge.改：在 is 后加 that。that 虽无词义但引导主语从句位于句首时不能省略。2. If shecomings or not doesn t matter much.改：将 If 变为 Whether。 if, whether 都可表示 “是否 ”,但 if 不能引导位于主句之前的主语从句，它可以引导位于主句之后带有形式主语it 的主语从句。3. That the professor said is of great importance.改：将 That 改为 What。that 引导主语从句时无词义

11、， 只起一个连接的作用。 Whatthe professor said表示 “教授所说的 ”，said 后面还需要一个宾语， 就只能用 what。4. Where will the trees be planted has not been decided.改：将 will 置于 trees之后。主语从句要用陈述句语序。5. No matter who breaks the rule will be punished.改：将 No matter who 变为 whoever。引导让步状语从句时二者可互换，但引导名词性从句时只能用whoever。6. When and where the mee

12、ting will be held still remain a question.改：将 remain 变为 remains。主语从句表示单一概念时，谓语要用单数形式。清代 “红顶商人 ”胡雪岩说：“做生意顶要紧的是眼光，看得到一省，就能做一省的生意；看得到天下，就能做天下的生意；看得到外国，就能做外国的生意。”可见，一个人的心胸和眼光，决定了他志向的短浅或高远；一个人的希望和梦想，决定了他的人生暗淡或辉煌。人生能有几回搏，有生不搏待何时！所有的机遇和成功，都在充满阳光，充满希望的大道之上！我们走过了黑夜，就迎来了黎明；走过了荆棘，就迎来了花丛；走过了坎坷，就走出了泥泞；走过了失败，就走向了成功！一个人只要心存希望，坚强坚韧，坚持不懈，勇往直前地去追寻，去探索，去拼搏，他总有一天