【含答案老师方便又实用】《高中英语从句语法》

合集下载

高中英语名词性从句知识讲解以及练习题附答案

高中英语名词性从句知识讲解以及练习题附答案一、名词性从句概述名词性从句是一种充当名词作用的从句，通常在主句中作主语、宾语、表语或同位语。

它通常由引导词（如that, whether, if, who, whom, whose, which, what等）引导，并且从句中含有一个主语和谓语。

名词性从句的种类有很多，包括主语从句、宾语从句、表语从句和同位语从句等。

下面我们将逐一介绍这些从句。

二、主语从句主语从句作为一个名词，通常位于句首，是一个句子，主要作用是作为主句的主语。

引导主语从句的词：What (什么)；Whether (是否)；If (是否)；That (那个)。

例句：What he said is true. (他说的是真的。

)Whether it will rain tomorrow is uncertain. (明天是否会下雨还不确定。

)If you go, I will go too. (如果你走，我也跟着走。

)That he is coming is good news. (他来的消息是好消息。

)注意：主语从句的谓语动词通常要用单数形式。

What引导的主语从句通常用来表示“事物”的概念。

三、宾语从句宾语从句是一个名词，通常位于主句的动词后面，作为主句的宾语。

它可以由常见的宾语从句引导词引导，例如whether, if, that, who, whom, whose, what, when, where, how等。

引导宾语从句的词：Whether (是否)；If (是否)；That (那个)；Who (谁)；Whom (谁)；Whose (谁的)；What (什么)；When (何时)；Where (何处)；How (如何)。

例句：I know that he is coming. (我知道他要来。

)I wonder if he is telling the truth. (我想知道他是否说了真话。

(完整版)人教版高一英语必修3宾语从句与表语从句详细讲解及练习.docx

Grammar宾语从句与表语从句名词性从句在复合句中起名词作用的从句叫做名词性从句。

名词性从句的作用相当于名词，因此主语从句、表语从句、宾语从句和同位语从句分别作主句的主语、表语、宾语和同位语。

主语从句： Who will win the match is still unknown. 宾语从句： I want to know what he has told you.表语从句： The fact is that we have lost the game.同位语从句： The news that we won the game is exciting.引导名词性从句的连接词可分为三类：连接词 (不充当从句的任何成分 )：that ,whether ,if连接代词：what, who, whom, whose, which, wh+ever连接副词： when ,where ,how ,whyObject Clauses宾语从句请对应写出句子成分I know him.（）（）（）I know who he is.（）（）（）请用横线画出下面句子的宾语从句部分。

1、I know him.2、Do you have the time?3、I think that she is beautiful.4、Why don’tyou pay attention to me?总结：宾语通常位于谓 _____________或者 _____________后一、宾语从句的概念：宾语从句在复合句中作主句的宾语。

位置：通常放在主句谓语动词（及物动词）或介词之后。

句子结构：主句+连词 (引导词 )+ 宾语从句e.g.She asked if these answers were right.We can learn what we do not know.He will talk to us about what he saw in the U.S.A.I don ’ t knowwhere we will hold the meeting.通过观察，我们可以知道宾语从句的语序用陈述语序：接 +主 ++其他成分：1)Could you tell me______.A. you will get here whenB. when will you get hereC. get here when you willD. when you will get here2)Mother asked his son what ______for lunch at school.A. did he hadB. does he hadC. he hasD. he had3)Pointing to the young plant, he asked me ____ that was the one we had seen in the picture.A. whatB. ifC. whereD. how二、接1、从属接 (不充当从句的任何成分 )： that ,whether ,if1）、 I hear (that) he will be back in an hour.2）、I want to know if /whether he will go to the park with us注：1、由 that 引的述句性的从句，在很多如say, think, wish , hope, see, believe, agree, expect, hear , feel等后。

高考英语语法名词性从句专题讲解练习含答案

名词性从句包括主语从句、宾语从句、表语从句和同位语从句。

名词性从句是一种具有名词功能的非独立分句。

具体用法见下表：主语从句大多数主语从句都可以用it作形式主语而把主语从句置于句尾。

(what引导的主语从句表示“……的东西”时，一般不用it作形式主语；whatever, whoever, whichever一般也不用it作形式主语。

)►It makes no difference where we shall have the meeting.我们在哪开会无所谓。

【注意】(1)常见的it替代that引导的主语从句的句式主要有以下几种：①It＋系动词＋形容词(necessary/right/likely/important/certain...)＋that从句②It＋be＋名词(短语)(a pity/a shame/good news/a fact/an honour...)＋that从句③It＋be＋过去分词(said/told/heard/reported/decided/suggested...)＋that从句④It＋特殊动词(seem/appear/happen/matter)＋that从句(2)在“It is necessary/important/natural...＋that从句”的结构中，从句谓语常用“(should ＋)动词原形”。

宾语从句1．动词find, feel, think, consider, make, believe等后有that引导的宾语从句作宾语补足语时，则常用it作形式宾语而将that宾语从句后置。

►I think it necessary that we take plenty of boiled water every day.我认为每天摄入足量的白开水很有必要。

2．有些动词(短语)不能直接跟宾语从句，需要借助形式宾语it。

常见的有hate, enjoy, like, dislike, love, appreciate, see to等。

高中英语语法表语从句练习含答案

高中英语语法表语从句练习含答案第一篇：高中英语语法表语从句练习含答案表语从句1.__________ is troubling me is _________ I don’t understand __________ he said.A.What;that;whatB.What;what;whatC.That;that;whatD.Why;that;which 2.---I drove to Zhuhai for the air show last week.---Is that __________ you had a few days off?A.whyB.whenC.whatD.where 3.Things were not _________ they seemed to be.A.whenB.whyC.thatD.where 4.If there was a reason why I achieved such a great success, maybe it is just __________ I have been so lucky.A.thatB.becauseC.in thatD.owing to the fact that 5.---Her ability has never been in doubt.---The question is _________ she is prepared to work hard.A.thatB.ifC.whereD.whether 6.The reason why she doesn’t go there was __________ a new job.A.because she gotB.because off gettingC.due to gettingD.that she got 7._________ surprised me was _______ hecouldn’t speak English.A.That;thatB.Why;thatC.Who;thatD.What;that 8.His first question was _________ T om had arrived.A.ifB.thatC.whetherD.what 9.The question is ________ can be put into practice.A.how you have learnedB.how what you have learnedC.that why you have learnedD.how that you have learned 10.A hinge joint is _________ permits the forward and backward movement of a door.A.thatB.whatC.thoseD.which 11.One reason why Hamlet is such a successful play is that _________.A.it appeals different to peopleB.different people are appealedC.it appeals to many different peopleD.people find it appealing to them very much 12.I think it is _________ you are doing too much.A.because ofB.becauseC.because thatD.due to 13.A more important question is _________ these ideas are well or ill found.A.whereB.whenC.howD.whether 14.The reason he is ill is _________ he ate too much.A.due toB.thatC.sinceD.because 15.Even the mountains here are no longer ________ they used to be.A.the sameB.whichC.thatD.what 16.That’s __________ I want to say.A.all whatB.whatC.all whichD.what that 17.That’s _____________.A.where out differences lieB.our differences lie thereC.where do our differences lieC.that where out differences lie 18.That is __________.A.where lived he thereB.where did he livedC.where he livedD.that where he lived 19.The question is ____________.A.whether is it worth doingB.that if it is worth doingC.whether it is worth doingC.if it is worth doing 20.Water will continue to be __________ it is today next in importance to oxygen.A.howB.whichC.whatD.as 21.That’s __________.A.how did I become a teacherB.how Ibecame a teacherC.how a teacher I becameD.that I became a teacher 22.They are just ___________.A.that what shall I haveB.what shall I haveC.that I shall have whatD.what I shall have 23.It looked ___________.A.as if it was going to rainB.that as if it was going to rainC.as if was it going to rainD.as if that it was going to rain 24.That’s ____________.A.how she did itB.that how did she do itC.how did she do itD.what she did it 25.That is _________ we decided to put the discussion off.A.whereB.whichC.thatD.why 26.That’s ________ I lived which when I was ten years old.A.whereB.at whichC.there whereD.when 27.My suggestion is ________ we should send a few comrades to help them.A.ifB.thatC.when thatD.that where 28.With the development of computers, it is_________ man has suddenly become a millionaire of the mind.A.thatB.as ifC.whyD.as 29.It looks ________ successful international cultural communication will make the world smaller.A.thatB.as ifC.whyD.as 30.The question is __________ we shall perform the experiment.A.whichB.whereC.whoD.thatAADAD DDCBB CBDBD BACCC BDAAD ABBBB第二篇：高中英语语法表语从句详解素材表语从句表语从句定义：在一个复合句中，从句作的是主语的表语成分。

高中英语从句精讲及练习附答案

高中英语从句解说与练习（ 1）表语从句1．定义：用作表语的从句叫做表语从句。

2．指引表语从句的关系词的种类：(1) 附属连词 that 。

在从句中不做成分。

如：The trouble is that I have lost his address.麻烦是我把他的地址丢了。

The reason was that he was late for school.(2) 附属连词 whether,as,as if 。

如：1.He looked just as he had looked ten years before.他看起来还与十年前相同。

2.The question is whether they will be able to help us.问题是他们能否能帮我们。

注：附属连词if 一般不用来指引表语从句，但as if 却可指引表语从句，如：All this was over twenty years ago, but it’ s as if it was only yesterday.这都是 20 多年前的事了，但犹如昨天相同。

The key is whether we can solve the problem.//It looked as if it was going to rain.注：能跟表语从句的谓语动词一般为系动词be, seem, look， sound 等。

如：He looked just as he had looked ten years before.他看起来还与十年前相同。

It sounds as if someone is knocking at the door.连结代词 who, whom, whose, what, which, whoever, whatever, whichever在表语从句中做主语、宾语等。

如：The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。

高中英语状语从句讲解及练习[含答案解析]

高中英语状语从句讲解及练习[含答案解析]状语从句讲解和练习状语修饰动词、形容词、副词或整个句子。

通常由副词、介词短语、动词不定式、分词和从句等担当。

例如：1. Naturally , our grandparents were pleased to get our phone call . (副词)2. We worked hard , from sunrise to sunset . (介词状短语)3. To help my disabled aunt , I spend an hour working in her house every day . (不定式)4. Seen from a distance , the farmhouse looked deserted . (过去分词)5. I know how to light a camp fire because I had done it before .（原因状语从句）状语的位置比较灵活，可以位于句首、句末或句中。

enough用作状语修饰形容词和副词时必须后置。

状语从句主要用来修饰主句或主句的谓语。

一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。

尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。

状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。

现分别列举如下:1．时间状语从句常用引导词：when, as, while, as soon as, while, before, after, since , till, until特殊引导词：the minute, the moment, the second, every time, the day，the instant, immediately , dire ctly, no sooner …than, hardly …when, scarcely …whenI didn’t realize how special my mother was until I became an adult.While John was watching TV, his wife was cooking.The children ran away from the orchard(果园) the moment they saw the guard.No sooner had I arrived home than it began to rain.Every time I listen to your advice, I get into trouble.2．地点状语从句常用引导词：where特殊引导词：wherever, anywhere, everywhereGenerally, air will be heavily polluted where there are factories.Wherever you go, you should work hard.3．原因状语从句常用引导词：because, since, as, since特殊引导词：seeing that, now that, in that, considering that, given that, considering that,My f riends dislike me because I’m handsome and successful.begin our conference.Now that everybody has come, let’sThe higher income tax is harmful in that it may discourage people from trying to earn more. Considering that he is no more than 12 years old, his height of 1.80 m is quite remarkable.4．目的状语从句常用引导词：so that, in order that特殊引导词：lest, in case, for fear that，in the hope that, for the purpose that, to the end thatThe boss asked the secretary to hurry up with the letters so that he could sign them.The teacher raised his voice on purpose that the students in the back could hear more clearly.5．结果状语从句常用引导词：so …that, so…that, such …that,特殊引导词：such that, to the degree that, to the extent that, to such a degree that,He got up so early that he caught the first bus.It’s such a good chance that we must not miss it.To such an degree was he excited that he couldn’t sleep last night.6．条件状语从句常用引导词：if, unless,特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition th atWe’ll start our project if the president agrees.You will certainly succeed so long as you keep on trying.Provided that there is no opposition, we shall hold the meeting here.7．让步状语从句常用引导词：though, although, even if, even though特殊引导词：as(用在让步状语从句中必须要倒装)，while ( 一般用在句首)，no matter …，in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whicheverMuch as I respect him, I can’t agree to his proposal.尽管我很尊敬他，我却不同意他的建议。

高中英语语法基础 ——定语从句知识点总结归纳讲解(附同步练习)(有答案)

高中英语语法基础——定语从句知识点归纳讲解（附同步练习）★先行词：被定语从句修饰的名词或代词叫先行词。

通常情况下，引导词前面的名词即为从句的先行词。

★关系词：引导定语从句的词叫关系词。

也可以称作引导词。

①关系代词：who，whom，which，that，whose，as，在从句内作主语、宾语等名词性成分。

②关系副词：when，where，why在从句内作状语。

（一）. 使用who、whom、which、that的定语从句1. whoThis is the boy who plays basketball very well.This is the teacher who is teaching us English.▲who 指人, 在从句中作主语。

2. whomThis is the boy (whom) I often help.The man is our headmaster (whom) you met just now.I met the girl (whom) you often praise.▲whom 指人,在从句中作宾语, 可省略。

3. whichThis is the farm which keeps many cows.This is the farm (which ) I visit every year.▲which 指事物, 在从句中作主语或宾语,作宾语时可省略。

4. that以上三种情况均可用that。

指人或指物，可作主语和宾语，作宾语时可省略。

（二）. 使用whose的定语从句Do you know the girl whose father is mayor.I used to work in an office whose window faces north.I work in a school whose students are excellent.▲whose 指人或物的所属关系，表示“某人的”或“某物的”。

高中英语名词性从句知识点含练习

高中英语名词性从句知识点（含练习）基础回顾1.表语：表语用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、动词的-ing、不定式、从句来充当，它常位于系动词(be, become, appear, seem,look,sound,feel,get,smell等词)之后。

如：Her job is selling computers. 此句表语为selling computers如果句子的表语也是由一个句子充当的，那么这个充当表语的句子就叫做表语从句。

2.同位语：一个名词(或其它形式)对另一个名词或代词进行解释或补充说明，这个名词(或其它形式)就是同位语。

如Mr. Smith,our new teacher,is very kind to us. 我们的新老师史密斯先生对我们很好。

Mr.Smith是主语our new teacher的同位语，指同一人。

同位语从句I heard the news that our team had won．我听到了我们队获胜的消息。

that our team had won 解释news的具体内容，是同位语正文一、定义在复合句中具有名词的性质的作主语、表语、同位语、宾语的从句叫名词性从句。

因此，我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句。

That he finished writing the composition in such a short time surprised us all他在很短的时间内写完作文让我们都很惊讶 (主语从句)The trouble is that she has lost his address. 麻烦的是她把他的地址搞丢了。

（表语从句）They have no idea at all where he has gone. 他们不知道他去什么地方了。

（同位语从句）Do you remember how he came? 你记得他怎么来的么？（宾语从句）二、语序名词性从句要采用陈述句语序。

高中英语之状语从句讲解、练习和答案

高中英语语法之状语从句在复合句中作状语，位置灵活。

状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。

一.时间状语从句1.when, as, whilea.when表时间，从句既可以用延续性动词，又可以用瞬间动词。

Eg: When I get there I will call you.如果when引导的时状的主语与主句的主语相同，而从句的谓语又是be动词时，那么从句中的主语与be可省。

Eg：When （you are）in trouble, you can ask her for help.如果when引导的时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。

Eg：When I came into the room(When coming into the room), I found the light was off.b.while表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。

主句的谓语动词通常是非延续性动词，若主从句动作同时发生，则都用进行时。

Eg: He came in while I was reading a book.I met her while I was in school.While my father is cleaning the car,my mother is doing the washing.c. as表时间，与when相似，但侧重强调主从句动作同在时间点或同时间段进行。

同时可表示主句的动作随着从句的动作的变化而变化。

Eg: He jumps as he sings.As the wind rose, the noise increased.2.before与afterEg：See me before you leave.I saw them after I arrived.注意：It will be/take long before sb do/does sth.(过了多久才。

(完整)高中英语从句精讲与练习(附答案)(2)

高中英语从句讲解与练习(1)表语从句1．定义：用作表语的从句叫做表语从句。

2．引导表语从句的关联词的种类：(1) 从属连词that 。

在从句中不做成分。

如：The trouble is that I have lost his address. 麻烦是我把他的地址丢了。

The reason was that he was late for school.(2) 从属连词whether,as,as if 。

如：1. He looked just as he had looked ten years before. 他看起来还与十年前一样。

2. The question is whether they will be able to help us. 问题是他们是否能帮我们。

注：从属连词if 一般不用来引导表语从句，但as if 却可引导表语从句，如：All this was over twenty years ago, but it ' s as if it was only yesterday.这都是20 多年前的事了，但宛如昨天一样。

The key is whether we can solve the problem.//It looked as if it was going to rain. 注：能跟表语从句的谓语动词一般为系动词be, seem, look，sound 等。

如：He looked just as he had looked ten years before. 他看起来还与十年前一样。

It sounds as if someone is knocking at the door.连接代词who, whom, whose, what, which, whoever, whatever, whichever 在表语从句中做主语、宾语等。

如：The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。

高中英语高中名词性从句讲解版含答案

名词性从句讲解【试一试】一，用that 与what 填空1.______ he wants is a book.2. ______ he wants to go there is obvious.3.The result is ______ we won the game.4.This is _____ we want to know.5.Is _____ he told us true ?6.We should pay attention to ______ the teacher is saying.7. I have no doubt _____ he will come.8. I have no idea _____ he did that afternoon.二、用适当的连词填空：1.____ you don’t like him is none of my business.2. ______ we’ll go camping depends on _____ it will be fine tomorrow.3. _____ she comes or not makes no difference.4. The question is ____ it is worth doing.5. There is some doubt ____he will come./ There is no doubt ____he will come.6. ____ is a fact that English is being accepted as an international language.7. _____ has helped to save the drowning girl is worth praising.8. It is said that the famous football star is not willing to play for ______ would pay him three million dollars a year.9. It was about 600 years ago ____ the first clock with a face and an hour hand was made.10. --- I drove to Zhuhai for the air show last week.--- Is that _____ you had a few days off?11. ---Do you remember____ he came? --- Yes, I do, he came by car.12. It is generally considered unwise to give a child _____ he or she wants三．改错：1. He has come back so early surprises all of us.2. That he really means is what he doesn’t agree with us.3. The news which our team had won pleased everyone.4. The reason why he failed in the exam was because he was too careless.5. It is unknown that where we will have the meeting.6. The problem is when will he come back.7. Could you tell me which was the way to the Science Museum?8. If he is an engineer is unknown.9. I have been worrying about if I have hurt her feelings.10. What he needs are enough time and what I need is enough books.11. No matter who comes to visit the exhibition is welcome.12. I’ll make known to all that you were not honest.13. He is said that he has gone to America.14. My suggestion is that we will learn more words by heart.15. Why we decided to put off the meeting is because we had some difficulty in preparing it.答案：一、用that或what填空1. What2.That3.that4.what5. what6. what7. that8.二、用适当的连词填空：1. That2. Whether, whether3. Whether4. whether5. whether6. It7. Whoever8.whoever 9. that 10. why 11. how 12.whatever1. 【误】He has come back so early surprises all of us.【正】That he has come back so early surprises all of us.【析】that引导名词性从句时,尽管无意义也不充当成分,但除了在动词后引导单个宾语从句时可省略外，其它情况下不能省略。

高中英语语法_九大状语从句讲解大全(附练习和答案)

【高中语法·状语从句专辑】状语从句和名词性从句、定语从句一样是高考的高频考点。

通过对近年高考题的分析，可以预测2012年对状语从句的考查仍将集中在对引导几大状语从句的连词的考查上。

状语从句是一种作状语用的从句，修饰主句中的动词、形容词、副词或修饰全句，补充说明时间、地点、原因、条件、方式、程度、状态等。

状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。

九种状语从句及常见的引导词1、【时间状语从句】：when, while, as, before, after, since（自从…以来）, till (until), as soon as(刚一…马上就…), once(一旦), whenever等。

特殊引导词：the minute, the moment, the second, every time, the day，the instant=instantly , immediately , directly, no sooner … than, hardly …when, scarcely … when (1) while 引导的时间从句的谓语必须是延续性动词，常用进行时态。

如果while表示“然而”的时候，就不是时间状语从句；表示“虽然”的时候，是让步状语从句，这是必须放句首且不能倒装。

(2) when 除了表示“当……时”（两个短暂性动作同时发生），还可以表示“就在那时”，在前一个动作刚结束时就发生的新动作。

如I just locked my door when the postman arrived.(3) as 和when一样，表示两个短暂性动作同时发生，还可表示“一边……一边……”“随着…”(4) 党表示“一……就……”的连接词时，可以用到no sooner … than, hardly …when, scarcely … when，但是当hardly, scarcely, no sooner放于句首时，主句必须部分倒装；主句时态用过去完成时，从句用一般过去式。

完整版)高中-同位语从句详细讲解与练习(附答案)

完整版)高中-同位语从句详细讲解与练习(附答案)同位语从句是用作同位语的从句，通常用于解释或说明先行词。

常见的先行词有fact、news、idea、thought、n、reply、report、remark等。

连接同位语从句的从属连词多为that，有时也可以用whether。

例如：They were all very worried that you were sick。

这件事让他们都非常担心。

I have no idea whetherhe'll come or not。

我不知道他是否会来。

除了that之外，连接代词who、which、what和连接副词where、when、why、how也可以引导同位语从句。

例如：The n who should do the work requires ___。

谁该干这项工作，这个问题需要考虑。

___ where we are going to ___。

我们还没有决定去哪里度暑假的问题。

同位语从句与定语从句的区别在于，同位语从句只起连接从句的作用，没有实际意义，且不能省略连接词that。

而定语从句则起到限定作用，可以用关系代词who、which、that等引导，且连接词可以省略。

例如：The book that ___。

我昨天买的那本书很有趣。

同位语从句是指在复合句中作为同位语的从句，一般紧跟在某些名词后面，用以说明该名词表示的具体内容。

比较常用的名词有news，idea，fact，promise，n，doubt，thought，hope，message，n，words（消息），possibility等。

例如，I heard the news that our team had won.（我听到了我们队获胜的消息。

）同位语从句的引导词包括连词that，whether，连接代词和连接副词等。

在某些名词后面的同位语从句要用虚拟语气，如demand。

wish。

高中语法名词性从句讲解和练习有答案

高中语法名词性从句讲解和练习有答案高中英语语法之名词性从句在句子中起名词作用的句子叫名词性从句(Noun Clauses）。

名词性从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。

一、引导名词性从句的连接词引导名词性从句的连接词可分为三类：连词：that（无任何词意）whether,if（均表示“是否”表明从句内容的不确定性）as if ,as though （均表示“好像”，“似乎”）以上在从句中均不充当任何成分连接代词：what, whatever, who, whoever, whom,whose, whichever,whomever连接副词：when, where, how, why,how many,how much,how often不可省略的连词：1. 介词后的连词2. 引导主语从句和同位语从句的连词不可省略。

That she was chosen made us very happy. We heard the news that our team had won.比较：whether与if 均为"是否"的意思。

但在下列情况下，只可用whether：1. whether引导主语从句并在句首2. 引导表语从句3. whether从句作介词宾语4. 从句后有"or not"Whether he will come is not clear.大部分连接词引导的主语从句都可以置于句末，用it充当形式主语。

It is not important who will go. It is still unknown which team will win the match.二. 主语从句1、作句子主语的从句叫主语从句。

主语从句通常由从属连词that，whether，if和连接代词what，who，which，whatever，whoever 以及连接副词how，when，where，why等词引导。

(完整版)高中名词性从句全面讲解及练习(含答案)

高中英语讲义---- 名词性从句（主从、表从、宾从，同从）1，陈述句做名从用连词that + SV, that 表主句肯定从句完整，不做成分。

主从可用it 做形式主语，宾从第一个that 可省略。

You study hard.主从：That you study hard is known to us.= It is known to us that you study hard.表从：My opinion is that you study hard .宾从：I think (that) you study hard. …and that (不能省略)….同从：My opinion that you study hard is known to us. *比较同从和主从！●一般抽象名词后对其进行解释和说明的完整句子就是其同位语从句，不完整就是定语从句。

I appreciate your idea that we have an exam every week. （that后完整—同从）I appreciate your idea that you came up with last time.（that后不完整---定从）2，一般问句做名从用连词whether(是否) + SV，whether表主句不肯定从句完整，宾从中可用if（介词后或宾从后有or not时只用whether）。

Does your friend like English ?主从：Whether your friend likes English isn’t clear .=It isn’t clear whether your friend likes English.表从：My question is whether your friend likes English.宾从：I don’t know whether/ if your friend likes English.同从：My question whether your friend likes English isn’t clear.3, 特殊问句做名从用疑问词（连词）+ SV, 疑问词做主语时直接+谓语。

高中英语状语从句讲解及练习(含答案)

状语从句状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。

一、时间状语从句引导时间状语从句的连词有：when, as, while, until, not…until, before, after, since, the minute, the moment, each( every, next, the first) time等。

时间状语从句中一般用一般现在时或一般过去时。

1．When , while, as都可解释为“当```的时候”但侧重点有所不同。

1)WhenEg: When I arrived home , I had a little rest.注意点：when 从句的主语与主句主语相同，谓语动词是be 动词时，从句主语和be可以省略。

Eg: When (she was) walking along the street, she met her class teacher.2)AsAs 除了表示“当```的时候”，还可表示为“一面```一面”，“随着”Eg: He sang as he danced.(一面```一面)You will grow wiser as you grow older.(随着)3)While表示“当```的时候”强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。

Eg: While we were working, they were having a rest.While (they were) having a discussion, they got very confused.注意点：while 有对比的含义，解释为“然而”。

eg: I prefer black tee, while he likes coffee.2．until, not…until表示“直到```才”,在肯定句中主句常用延续性动词；在否定句中主句常用短暂性动词。