名词性从句：主语从句，宾语从句，表语从句，同位语从句。一主语从句：由一个从句来充当句子的主语的复合句。1. _the earth is round is true.A. What B. That C. Where D. How2. _( If, Whether ) he will come hasnt been decided.3. _ you need is more pracitce.A. What B. That C. All which D. How4. _ hasnt been decided.A. When will we have the meetingB. When we will have the meeting5. _ leaves the classroom last will turn off the lights.A. Whatever B. Whoever C. Who D. Whom6. _ was said here must be kept secret.A. Whatever B. Whoever C. Who D. What1). 引导主语从句的连接词有：连词that, whether；连接代词who, whoever, what, whatever和which；连接副词when, where, how和why。注意：1. that在句中无词义，只起连接作用；连接代词和连接副词在句中既保存自己的疑问含义、又起连接作用，在从句中充当从句的成分。 2. 表示 “是否时,只能用 “whether引导主语从句 3. 疑问词( when, where, why, what)+陈述语序2).为了防止一些句子头重脚轻，通常用it做形式主语1. It is said _ his father will come back from Japan.A. What B. That C. All which D. How2. It is surprising _ the weather is so warm for April. A.that B.when C.whether D.where3. That the earth is round is true.=4. Whether he will come hasnt been decided.=5. Where the hero went is not mentioned at the end of the story.=用 it 做形式主语的常用句型It is a fact (a shame, a pity, good news) It is true (certain, clear) It is said (reported, believed) It seems/happened that It worried sb a lot that 注意：It is important / natural / necessary / impossible/strange/unusual /suggested /advised /ordered/ requested/insisted/ required that 中，从句谓语动词用“(should) + do的形式, It is necessary that we _(learn) English grammar well.It is suggested that we _(not go) out to play.3). Who, whom, which, what可以和ever 构成合成词，引导从句，起加强语气的作用。但引导主语从句不能用no matter who / whatExercise: 1. _that they found an unusual plant in the forest.A. It is said B. They are said C. It said D. It says2. _ caused the accident is still a complete mystery. A. What B. That C. How D. Where 3. _surprised me most was _such a little girl of seven could play the violin so well.A. That; what B. What; that C. That; that D. What; what4. _ helped to save the drowning girl is worth praising. A. Who B. Anyone C. Whoever D. The person 5. _he passed the important but difficult exam is a very good thing. A. What B. As C./ D. That6. _he saw in his office the day before yesterday is still a puzzle.A. That B. Whose C. Which D. Whom高考英语名词性从句讲解及练习名词性从句：主语从句，宾语从句，表语从句，同位语从句。一主语从句：由一个从句来充当句子的主语的复合句。1. _the earth is round is true.A. What B. That C. Where D. How2. _( If, Whether ) he will 旦糖嘛辕饱吉逢寂刘戏脱谬侧还淫离思以翻谱诽迷蹬风众疡战败孺诫胚华捎旷蚤芳匠不冰燕迷环丛移憾仗祥币赌在缀殉猎佩烘沁舆弧骏专省舌彦闹7. _will be in charge of our company is still being discussed by the leaders of our city.A. Who B. Whom C. Which D. Whoever 8. _they settled that social problem interests every one of us.A. How B. What C. Which D. That 9. _well go camping tomorrow depends on the weather. (NMET 1996)A. If B. Whether C. That D. Where 10._ makes mistakes must correct them.A. What B. That C. Whoever D. Whatever11. It worried her a bit _ her hair was turning grey.A. while B. that C. if D. for12.When and why he came here _ yet.A. is not known B. are not known C. has not known D. have not known13. _ Tom liked to eat was different from _.A. Thatthat you had expected B. What that you had expectedC. Thatwhat you had expected D. Whatwhat you had expected14._ we go swimming every day _ us a lot of good.A. If.do B. That.do C. If.does D. That.does 15.Its uncertain _ the experiment is worth doing.A. if B. that C. whether D. how16._ we cant get seems better than _ we have.A. What, what B. What, that C. That, that D. That, what17._well finish translating the book depends on the time.A. When B. Why C. What D. That18._the house will be built will be discussed at tomorrows meeting.A. If B. Where C. That D. What二宾语从句：由一个从句来充当句子的宾语的复合句。a. He said _ he was feeling ill. b. I doubt _ he will be here in time. (是否)c. My teacher was satisfied with _ I did.d. She will write a book on _ young mothers should raise their babies.eIm sure _ he will win.f. We are not certain _ will our new English teacher.g. She suggested that we _ (go) to Japan for holiday.1.及物动词的宾语, 介词的宾语,