❶ 高考英語作文怎麼樣寫簡單的從句
比如提建議，用非限定性定語從句說明這項措施的好處（用於擴展，即使要點沒有也專可以寫）
We should take action by saving water and electricity , which is of great value to protect our environment
我們應該采屬取行動節約用水或電，這樣有利於保護環境、
這種句子很好用，而且後面從句用的方法不必太復雜，只要將到措施都可以套。
狀語從句
很經常用，再加個小亮點，主從主語一致時省略
When (we are) crossing the road, we should be careful.
If (you are) tired, you can listen to music or go for a walk to have a rest.
主語從句
What I think is of great importance is that +句子
我認為很重要的是……
後面跟措施，建議，後面句子隨便套
恩，我喜歡用的就這些了~~~如果也是高三的咱們一起加油咯！
❷ 高中英語：關於 名詞性從句
記住那幾個詞比看語法有效的多，比如It is necessary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that…
同位語從句說明其版前面的名詞的具權體內容。同位語從句通常由that引導，可用於同位語從句的名詞有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。
如果想知道具體的可以告知我你的郵箱，到時我發到你郵箱去。
❸ 求 高中英語名詞性從句的區別及注意事項
名詞性從句一.概念：在從句中起名詞作用的從句即名詞性從句。它們是：主語從句，賓語從句，同位語從句和表語從句。二.引起名詞性從句的連詞：1.that 無意義，只起倒引起從句的作用，如引導賓語從句可省略。That he beat his opponent in the tennis game encouraged his teammates.He said (that) another child was infected with bird flu.The fact is that he knows nothing about it.應用於Her dream that she will become a woman astronaut is sure to come true. 2.what 有意義，」所……的」或隨句子意思而定。在從句中作主語，賓語和表語。 What makes her different from others is her strange behaviour. This is what I want to say. Please tell me what it is. 3.whether 有意義，「是否」，引導賓語從句可以用if。 Whether it is true is not certain. He asked me whether/if he could ask another question. 4.when 引起表示時間的名詞性從句，意思是「……的時候」或「何時……」 When we can get rid of the rubbish is still unknown. They didn』t know when they could meet again. The question is when the money can be collected. 5.where 引起表示地點的名詞性從句，意思是「在……的地方」或「到……的地方」 Where the meeting will be held hasn』t been decided. Everyong wants to know where the plant can be found. 6.how 引起表示方式的名詞性從句，意思是「……的方式」或「如何……」 The problem is how we can get out of the trouble. How we can get in touch with him is the most important. 7.why 引起表示原因的名詞性從句，意思是「……的原因」或 「為什麼……」 Why he said that rubbish at the meeting puzzled me. At last,he told us why he didn』t agree with us. 8.who 「誰」 ,whom「誰」，whose「誰的」 Who will be chosen is the topic of conversation now. I want to know who/whom you really want to see. Whose handwriting is the most beautiful is very clear now. 9.疑問詞+ever 也可以引起名詞性從句 Whatever was said here must be kept secret. Whoever fails to see this will make a big mistake. I』ll give it to whoever likes it. Parents shouldn』t give their children whatever he/she wants.三. 名詞性從句的種類：四種——主語從句，賓語從句，同位語從句和表語從句1. 主語從句：在復合句中充當主語的從句叫主語從句，上述引導詞除if外均可引起主語從句。 Who has been chosen is still a secret to all. That one believes in oneself in doing everything is very important.注意：主語從句如果偏長，可將其移至謂語動詞之後，前面用it作形式主語。That he is an honest boy is known to all.→It is known to all that he is an honest boy.That the Chinese volleyball team once won six world championships successively is true.→It is true that the Chinese volleyball team once won six world championships. 在It is insisted/ordered/commanded/suggested/advised/proposed/demanded/required/requested…that…結構中，謂語動詞常用should+動詞原形。如：It is suggested that we should think twice before we act. It is requested that we should change the old instrument. 另外，在It is necessary/important/strange/surprised that…或 It is a pity/shamethat… 也用 should + 動詞原形 如：It is a pity that he should go without telling anyone. It is necessary that you should tell him the truth. 2. 賓語從句：在復合句中作賓語的從句叫賓語從句，以上連詞都可引起賓語從句。 Everyone knows that he always gives answers and never ask questions,so he is called Mr Know-all.賓語從句應注意的幾個問題：① 當一個動詞帶有兩個或兩個以上that 引導的賓語從句時，第一個that 可以省略，但從第二個開始不可以省略。 He said (that) he would spend his winter holiday in London this year and that it would be the first time he would spend his holiday alone abroad.② 當賓語從句有補語時，要用形式賓語it代替，而將賓語從句移至補語後，同時that不可省略。 We should make it clear that protecting the environment is everyone』s ty.We find it important that one forms a good habit.③ 在tell sb. that…; order sb.that…; remind sb.that…; explain to sb. that…; whisper to sb. that…等結構中that 不可省。 He told me that he was going abroad next month. He whispered to me that the man in blue is a policeman.④ 在be+adj.後的賓語從句中，that 可以省略。 I』m glad (that) I』ll see all my fiends soon. I』m sure (that) he will stand on our side.⑤ whether和if 均能引起賓語從句，但是if 只能在動詞後，在介詞後要用whether。 He asked whether/if we could do him a favour. We wondered whether/if he would come or not.---Will you come tomorrow?---Sorry,I really don』t know. It depends on whether it is raining (or not).⑥ 賓語從句在時態上要求與主句一致（即時態呼應），也就是說主句為一般現在時，從句可用任何時態；如從句為一般過去時態，主句應為過去時的某種時態。當然，從句為普遍真理和自然現象者例外. He says that he lives around the corner. He says that he has been here for a long time. He says that he once worked as a cook. He says that he is expecting his father』s telephone. He said that he was learning English for the 2008 Beijing Olympic Games. He said that he would go abroad for further information. He said that it does not snow in winter in Australia.⑦ 在某些動詞後的賓語從句中用虛擬語氣，其結構為should+動詞原形，should 可以省略。這些常用動詞是：一個堅決要求insist; 兩個命令order,command; 三個建議suggest,advise,propose；四個要求ask,demand,request,require 注意：insist有兩個意思「堅決要求」和「堅持認為」，前者用虛擬語氣，而後者用陳述語氣（實際時態）；同樣suggest 也有兩個意思「建議」和「表明」或「暗示」，當「建議」講時用虛擬語氣，否則用陳述語氣（實際時態）。 如：He insisted that he should go to the front.(虛擬語氣) He insisted that Tom was honest and hardworking.(陳述語氣) She suggested that she should answer the phone immediately.(虛擬語氣) The smile on her face suggested that he was satisfied with the result.(陳述語氣)上述其他動詞後一律用should+動詞原形如 They requested that an immediate answer should be given. He ordered that the troops (should) start at once.3.同位語從句：idea,fact,rumour,message,news,hope,belief,thought,doubt,proof,evid-ence，promise,probability等名詞後出現的that 或wh-引導的從句作同位語，人們稱之為同位語從句，同為語從句對所修飾得詞起解釋說明的作用。I had no idea that you were here.They expressed the hope that they would visit China again.There is no doubt that he is not fit for the job.The question how they could get the information was brought forward at the meeting .The government warned that the rumour that an earthquake would hit Harbin was not believable.在下列同位語從句中，謂語動詞用should+動詞原形：One』s suggestion /advice/order/requirement/request/that… 如：My suggestion that we should collect money for the poor girl has been taken.4.表語從句：由that, as if, wh-等引起的作表語的從句叫做表語從句。 The manager』s suggestion is that the new procts should be put in market as soon as possible. The fact remains that we are behind some developed countries. It seems /appears as if the problem has been settled. That』s what we should do. Asia is no longer what it used to be. That』s where we differ. That was how we were defeated. That was when our football team was formed. That was why we decided to put off the discussion. 在下列表語從句中，謂語動詞用should+動詞原形： One』s suggestion/requirement/order… is that… 如：My suggestion is that we should give him another chance. Her requirement is that she should be sent to Tibet to work.四. 解題要點： ①如果從句意思完整，須用that,因為that 不作成分。 ②在涉及到「是否……」時用whether,if只用在動詞後的賓語從句中，而且也可以換成whether. ③that和what不可混淆，that無意義，不作成份；what有意義，做成分 ④that的不可省。
❹ 高中英語名詞性從句總結 謝謝
名詞性從句的功能相當於名詞片語, 它在復合句中能擔任主語、賓語、表語、同位語、介詞賓語等，因此根據它在句中不同的語法功能，名詞性從句又可分別稱為主語從句、賓語從句、表語從句和同位語從句。一、引導名詞性從句的連接詞分類 引導名詞性從句的連接詞可分為三類： 連詞（5個）：that （賓語從句或表語從句中that有時可以省略） whether,if （均表示「是否」表明從句內容的不確定性） as if ,as though （均表示「好像」，「似乎」） 以上在從句中均不充當任何成分 連接代詞（9個）：what, whatever, who, whoever, whom, whomever, whose, which, whichever 連接副詞（7個）：when, where, how, why, whenever, wherever, however 不可省略的連詞： 1. 介詞後的連詞 2. 引導主語從句和同位語從句的連詞不可省略。 That she was chosen made us very happy. We heard the news that our team had won. 比較 whether與if 均為"是否"的意思。 但在下列情況下，只可用whether： 1. whether引導主語從句並在句首 2. 引導表語從句 3. whether從句作介詞賓語 4. 常與 "or not" 連用；if 則不可。 5. 引導同位語從句 Whether he will come is not clear. 大部分連接詞引導的主語從句都可以置於句末，用 it充當形式主語。 It is not important who will go. It is still unknown which team will win the match. 二. 主語從句 作句子主語的從句叫主語從句。主語從句通常由從屬連詞that，whether，if，as if和because等連接代詞what，who，which，whatever，whoever，whom等以及連接副詞how，when，where，why等詞引導。that在句中無詞義，只起連接作用；連接代詞和連接副詞在句中既保留自己的疑問含義、又起連接作用，在從句中充當從句的成分。because引導表語從句。註：whom、who指人，what指物，whatever，whoever表示泛指意義。例如： What he wants to tell us is not clear. 他要跟我們說什麼，還不清楚。 Who will win the match is still unknown. 誰能贏得這場比賽還不得而知。 It is known to us how he became a writer. 我們都知道他是如何成為一名作家的。 Where the English evening will be held has not yet been announced. 英語晚會將在哪裡舉行，還沒有宣布。 有時為避免句子頭重腳輕，常用形式主語it代替主語從句作形式主語放於句首，而把主語從句置於句末。主語從句後的謂語動詞一般用單數形式。常用句型如下： （1） It + be + 名詞 + that從句 （2）It + be + 形容詞 + that從句 （3）It + be + 動詞的過去分詞 + that從句 （4）It + 不及物動詞 + that 從句 另注意在主語從句中用來表示驚奇、不相信、惋惜、理應如此等語氣時，謂語動詞要用虛擬語氣「(should) +do」，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that… 三、賓語從句 名詞從句用作賓語的從句叫賓語從句。引導賓語從句的關聯詞與引導主語從句表語從句的關聯詞大致一樣，在句中可以作謂語動詞或介詞及非謂語動詞的賓語。 1. 由連接詞that引導的賓語從句 由連接詞that引導賓語從句時，that在句中不擔任任何成分，在口語或非正式的文體中常被省去，但如從句是並列句時,第二個分句前的that不可省。例如： He has told me that he will go to Shanghai tomorrow. 他已經告訴我他明天要去上海。 We must never think (that) we are good in everything while others are good in nothing. 我們決不能認為自己什麼都好，別人什麼都不好。 注意：在demand、order、suggest、decide、insist, desire, request, command, doubt等表示要求、命令、建議、決定等意義的動詞後，賓語從句常用「（should）+ 動詞原形」。例如： I insist that she (should) do her work alone. 我堅持要她自己工作。 The commander ordered that troops (should) set off at once. 司令員命令部隊馬上出發。 2. 用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等關聯詞引導的賓語從句相當於特殊疑問句，應注意句子語序要用陳述語序。例如： I want to know what he has told you. 我想知道他告訴了你什麼。 She always thinks of how she can work well. 她總是在想怎樣能把工作做好。 She will give whoever needs help a warm support. 凡需要幫助的人，她都會給予熱情的支持。 3. 用whether或if引導的賓語從句，其主語和謂語的順序也不能顛倒，仍保持陳述句語序。此外，whether與if 在作「是否」的意思講時在下列情況下一般只能用whether，不用if： a. 引導主語從句並在句首時；b. 引導表語從句時；c . 引導從句作介詞賓語時；d. 從句後有「or not」時；e. 後接動詞不定式時。例如： Whether there is life on the moon is an interesting question. 月球上有沒有生命是個有趣的問題。 Everything depends on whether we have enough money. 一切要看我們是否有足夠的錢。 I wonder whether he will come or not. 我想知道他來還是不來。 Can you tell me whether to go or to stay? 你能否告訴我是去還是留？ 4. 注意賓語從句中的時態呼應，當主句動詞是現在時，從句根據自身的句子情況，而使用 不同時態。例如： I know (that) he studies English every day. （從句用一般現在時） I know (that) he studied English last term. （從句用一般過去時） I know (that) he will study English next year. （從句用一般將來時） I know (that) he has studied English since 1998. （從句用現在完成時） 當主句動詞是過去時態（could, would除外），從句則要用相應的過去時態，如一般過去時，過去進行時，過去將來時等；當從句表示的是客觀真理，科學原理，自然現象，則從句仍用現在時態。例如： The teacher told us that Tom had left us for America． 5. think, believe, imagine, suppose等等動詞引起的否定性賓語從句中，要把上述主句中的動詞變為否定式。即將從句中的否定形式移到主句中。例如： We don』t think you are here. 我們認為你不在這。 I don』t believe he will do so. 我相信他不會這樣做。 四、表語從句 在復合句中，位於系動詞之後作表語的從句叫表語從句。引導表語從句的關聯詞與引導主語從句的關聯詞大致一樣，表語從句位於連系動詞後，有時用as if引導。其基本結構為：主語 + 系動詞 + that從句。例如： The fact is that we have lost the game. 事實是我們已經輸了這場比賽。 That』s just what I want. 這正是我想要的。 This is where our problem lies. 這就是我們的問題所在。 That is why he didn』t come to the meeting. 那就是他為什麼不到會的原因。 It looks as if it is going to rain. 看上去天要下雨了。 需要注意的，當主語是reason時，表語從句要用that引導而不是because。例如： The reason why he was late was that he missed the train by one minute this morning . 【注意】whether 可引導表語從句，但與之同義的if卻通常不用於引導表語從句。 五、同位語從句 同位語從句說明其前面的名詞的具體內容。同位語從句通常由that引導，可用於同位語從句的名詞有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。例如： The news that we won the game is exciting. 我們贏得這場比賽的消息令人激動。 I have no idea when he will come back home. 我不知道他什麼時候回來。 The thought came to him that Mary had probably fallen ill. 他想到可能瑪麗生病了。 同位語從句和定語從句的區別： that作為關系代詞，可以引導定語從句，充當句子成分，在從句中作賓語時可以省略； that引導同位語從句時，起連詞的作用，沒有實際意義，不充當句子成分，一般不能省略。 試比較下面兩個例句: I had no idea that you were here．（that引導同位語從句，不能省略） Have you got the idea（that）this book gives you of life in ancient Greece？（that引導定語從句，作賓語，可以省略） 六、名詞性that-從句 （1）由從屬連詞that引導的從句叫做名詞性that-從句。That只起連接主句和從句的作用，在從句中不擔任任何成分，本身也沒有詞義。名詞性that-從句在句中能充當主 語、賓語、表語、同位語和形容詞賓語，例如： 主語：That she is still alive is her luck. 她還活著全靠運氣。 賓語：John said that he was leaving for London on Wednesday. 約翰說他星期三要到倫敦去。 表語：The fact is that he has not been seen recently. 事實是近來誰也沒有見過他。 同位語：The fact that he has not been seen recently disturbs everyone in his office. 近來誰也沒有見過他，這一事實令辦公室所有的人不安。 形容詞賓語：I am glad that you are satisfied with your job. 你對工作滿意我感到很高興。 2）That-從句作主語通常用it作先行詞，而將that-從句置於句末，例如： It is quite clear that the whole project is doomed to failure. 很清楚，整個計劃註定要失敗。 It's a pity that you should have to leave. 你非走不可真是件憾事。 用it作形式主語的that-從句有以下四種不同的搭配關系： a. It + be +形容詞+ that-從句 It is necessary that… 有必要…… It is important that… 重要的是…… It is obvious that… 很明顯…… b. It + be + -ed 分詞+ that-從句 It is believed that… 人們相信…… It is known to all that… 眾所周知…… It has been decided that… 已決定…… c. It + be +名詞+ that-從句 It is common knowledge that… ……是常識 It is a surprise that… 令人驚奇的是…… It is a fact that… 事實是…… d. It +不及物動詞+ that-從句 It appears that… 似乎…… It happens that… 碰巧…… It occurred to me that… 我突然想起…… 七、名詞性wh-從句 1）由wh-詞引導的名詞從句叫做名詞性wh-從句。Wh-詞包括who, whom,. whose, whoever, what, whatever, which, whichever等連接代詞和where, when, how, why等連接副詞。Wh-從句的語法功能除了和that-從句一樣外，還可充當介詞賓語、賓語補語和間接賓語等，例如： 主語： How the book will sell depends on its author. 書銷售如何取決於作者本人。 直接賓語：In one's own home one can do what one likes. 在自己家裡可以隨心所欲。 間接賓語：The club will give whoever wins a prize. 俱樂部將給得勝者設獎。 表語： My question is who will take over president of the Foundation. 我的問題是誰將接任該基金會主席職位。 賓語補足語：She will name him whatever she wants to. 她高興給他起什麼名字就取什麼名字。 同位語： I have no idea when he will return. 我不知道他什麼時候回來。 形容詞賓語：I'm not sure why she refused their invitation. 我尚不能肯定她為什麼拒絕他們的邀請。 介詞賓語： That depends on where we shall go. 那取決於我們去哪兒。 2）Wh-從句作主語也常用先行詞it做形式主語，而將wh-從句置於句末，例如： It is not yet decided who will do that job. 還沒決定誰做這項工作。 It remains unknown when they are going to get married. 他們何時結婚依然不明。 八、if, whether引導的名詞從句 1）yes-no型疑問從句 從屬連詞if, whether引導的名詞從句是由一般疑問句或選擇疑問轉化而來的，因此也分別被稱為yes-no型疑問句從句和選擇型疑問從句，其功能和wh-從句的功能相同， 例如： 主語：Whether the plan is feasible remains to be proved. 這一計劃是否可行還有待證實。 賓語：Let us know whether / if you can finish the article before Friday. 請讓我們知道你是否能在星期五以前把文章寫完。 表語：The point is whether we should lend him the money. 問題在於我們是否應該借錢給他。 同位語：They are investigating the question whether the man is trustworthy. 他們調查他是否值得信賴。 形容詞賓語： She's doubtful whether we shall be able to come. 她懷疑我們是否能夠前來。 介詞賓語： I worry about whether he can pass through the crisis of his illness. 我擔心他是否能度過疾病的危險期。 2）選擇性疑問從句 選擇性疑問從句由關聯詞if/whether…or或whether…or not構成，例如： Please tell me whether / if they are Swedish or Danish. 請告訴我他們是瑞典人還是丹麥人。 I don't care whether you like the plan or not.我不在乎你是否喜歡該計劃。 if和whether的區別： 1、 在動詞不定式之前只能用whether 。如： 例8 I can』t decide whether to stay. 我不能決定是否留下。 2、 在whether …… or not 的固定搭配中。如： 例9 I want to know whether it』s good news or not . 我想知道是否是好消息。 3 、在介詞後，只能用whether。如： 例10 His father is worried about whether he lose his work . 他的父親擔心是否會失去工作。 4、賓語從句放在句首表示強調時，只能用whether 。如： Whether this is true or not, I really don』t know. 這是否真的，我真的不知道。 （例11 Whether they can finish the work on time is still a problem . 他們是否能准時完成這項工作還是個問題。－－此例為主語從句，有誤，感謝指出） 5、用if會引起歧義時，只用whether。如： 例12 Could you tell me if you know the answer ? 這句話有兩種意思：「你能告訴我是否知道答案嗎？」或「如果你知道答案，請告訴我，好嗎？」。如用whether可避免歧義. 九、否定轉移 1) 將think, believe, suppose, expect, fancy, imagine等動詞後面賓語從句的否定詞轉移到主句中，即主句的謂語動詞用否定式，而從句的謂語動詞用肯定式。 I don't think I know you. 我想我並不認識你。 I don' t believe he will come. 我相信他不回來。 注意：若謂語動詞為hope,賓語從句中的否定詞不能轉移。 I hope you weren't ill. 我想你沒有生病吧。 2) 將seem, appear 等後的從句的否定轉移到前面。 It doesn't seem that they know where to go. 看來他們不知道往哪去。 It doesn't appear that we'll have a sunny day tomorrow. 看來我們明天不會碰上好天氣。 3) 有時將動名詞，介詞短語或整個從句的否定轉變為對謂語動詞的否定。 I don't remember having ever seen such a man. 我記得從未見過這樣一個人。 (not否定動名詞短語 having…) It's not a place where anyone would expect to see strange characters on the street. 在這里，人們不會想到在街上會碰上陌生的人。 (anyone 作主語，從句中的謂語動詞不能用否定形式。) 4) 有時狀語或狀語從句中否定可以轉移到謂語動詞前。 The ant is not gathering this for itself alone. (否定狀語) 螞蟻不只是為自己採食。 He was not ready to believe something just because Aristotle said so. (否定because狀語) 他並不因亞里斯多德說過如何如何，就輕信此事。 She had not been married many weeks when that man's younger brother saw her and was struck by her beauty. (否定狀語many weeks) 她結婚還不到幾個星期，這個人的弟弟就看見她了，並對她的美貌著了迷。
❺ 高中英語語法 的名詞性從句
名詞性從句
名詞性從句就是在句子中充當名詞功能的以相關從屬連詞引導的從句，包括主語從句、賓語從句、表語從句和同位語從句四種。
1．主語從句：以連詞 that what whom whose what which whoever whatever whichever where when how why 引導，在句子中充當主語。
例：What she said is not yet known.
How this happened is not clear to anyone.
Whoever comes is welcome.
That she will do well is her exam is certain.（It is certain that she will do well in her exam.）
註：it 為形式主語，
2．賓語從句：以連詞 that who whom whose what 等引導，在句子中充當賓語。
例：He told us that he felt ill.
Everybody knows what happened.
I doubt whether he will succeed.
I wonder what he is writing about.
3．表語從句：以 that whether who whom whoever when where when 等引導，在句子中充當表語。
例：The trouble is that I lost his address.
The question is whether they will be able to help us.
That was what she did this morning.
This is why we puts off the sports meeting.
4．同位語從句：同位語從句有自己的先行詞，它跟定語從句很相似，先行詞包含從句中所含內容，從句不起修飾作用。我們將在學習定語從句時，在加以詳細比較，多用在連詞what 引導。（不用which，此外還可用whether who where 等也可以引導。在這章中我們著重學習that whether 引導的同位語從句，引導同位語從句的先行詞常用的有：fact news idea whether reply promise truth report remark 等。
例：I heard the news that the Chinese football team defeated the Japanese team
last night.
I have no idea whether he will come or not.
They were all much worried over the fact that you were sick.
關於名詞性從句的學習主要是我們應在學習中加以練習，在練習中反復學習，在多次重復學習和練習中加以掌握。
❻ 高中英語定語從句，名詞性從句區別，名詞性從句用法。要詳細。
定語從句在主句中充當定語，起修飾作用，相當於一個虛詞，即去掉它句子仍版然完整。
而名詞性從句權，從句在主句中充當名名詞的作用，也就是相當於一個實詞，當去掉它的時候，主句也就不完整了。
以上是區分定語從句和名詞性從句。
http://ke..com/view/414544.htm
名詞性從句
❼ 高中英語，，定從和名詞性從句什麼區別，求歸納
首先搞抄清名詞和定語的襲區別。
名詞在句中的成分，有主語，賓語，表語，同位語，是一個名詞性的存在。
定語是形容名詞用的成分,是形容詞性的存在。
名詞從句就是一個句子當名詞。名詞性從句又可分別稱為主語從句、賓語從句、表語從句和同位語從句。
定語從句就是一個句子做定語，這個句子去修飾一個名詞。
❽ 求對英語名詞性從句的詳細總結，高考用
名詞性從句是由if, whether, that 和各種疑問詞充當連接詞所引導的從句，其功同名詞一樣。
一．主語從句
主語從句是在復合句中充當主語的從句，通常放在主句謂語動詞之前或由形式主語it代替，而本身放在句子末尾。
1. It 作形式主語和it引導強調句的比較
It 作形式主語代替主語從句，主要是為了平衡句子結構，主語從句的連接詞沒有變化。而it引導的強調句則是對句子某一部分進行強調，無論強調的是什麼成分，都可用連詞that。被強調部分指人是也可用who/whom。例如：
It is a pity that you didn』t go to see the film.
It doesn』t interest me whether you succeed or not.
It is in the morning that the murder took place.
It is John that broke the window.
2. 用it 作形式主語的結構
(1) It is ＋名詞＋從句
It is a fact that … 事實是…
It is an honor that …非常榮幸
It is common knowledge that …是常識
(2) it is ＋形容詞＋從句
It is natural that… 很自然…
It is strange that… 奇怪的是…
(3) it is ＋不及物動詞＋從句
It seems that… 似乎…
It happened that… 碰巧…
(4) it ＋過去分詞＋從句
It is reported that… 據報道…
It has been proved that… 已證實…
3. 主語從句不可位於句首的五種情況
(1) if 引導的主語從句不可居於復合句句首。
(2) It is said , (reported) …結構中的主語從句不可提前。例如：
It is said that President Jingo will visit our school next week. (right)
That President Jiang will visit our school next week is said. (wrong)
(3) It happens…, It occurs… 結構中的主語從句不可提前。例如：
It occurred to him that he failed in the examination. (right)
That he failed in the examination occurred to him. (wrong)
(4) It doesn』t matter how/whether …結構中的主語從句不可提前。例如：
It doesn』t matter whether he is wrong or not. (right)
Whether he is wrong or not doesn』t matter. (wrong)
(5) 含主語從句的復合句是疑問句時，主語從句不可提前。例如：
Is it likely that it will rain in the evening? (right)
Is that will rain in the evening likely? (wrong)
4. What 與that 在引導主語從句時的區別
What 引導主語從句時在句時在從句中充當句子成分，如主語．賓語．表語，而that 則不然。例如：
1) What you said yesterday is right.
2) That she is still alive is a consolation.
二．賓語從句
賓語從句就是在復合句中作賓語的名詞性從句，通常放在主句謂語動詞（及物動詞）或介詞之後。
1. 作動詞的賓語
(1) 由that引導的賓語從句（that 通常可以省略）,例如：
I heard that be joined the army.
(2) 由what, whether (if) 引導的賓語從句，例如：
1) She did not know what had happened.
2) I wonder whether you can change this note for me.
(3) 動詞＋間接賓語＋賓語從句。例如：
She told me that she would accept my invitation.
2. 作介詞的賓語
例如：Our success depends upon how well we can cooperate with one another.
3. 作形容詞的賓語
例如：I am afraid (that) I』ve made a mistake.
That 引導的從句常跟在下列形容詞後作賓語：
Anxious, aware, certain, confident, convinced, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, annoyed, pleased, hurt, satisfied, content 等。也可以將此類詞後的that 從句的看作原因狀語從句。
4. It 可以作為形式賓語
It 不僅可以作為形式主語，還可以作為形式賓語而真正的賓語that 從句則放在句尾，特別是在帶復合賓語的句子中。 例如：
We heard it that she would get married next month..
5. 後邊不能直接跟that 從句的動詞
這類動詞有Allow, refuse, let, like, cause, force, admire, condemn, celebrate, dislike, love, help, take, forgive等。這類詞後可以用不定式或動名詞作賓語，但不可以用that引導的賓語從句。例如：
I admire their winning the match. (right)
I admire that they won the match. (wrong)
6. 不可用that從句作直接賓語的動詞
有些動詞不可用於「動詞＋間接賓語＋that從句「結構中，常見的有Envy, order, accuse, refuse, impress, forgive, blame, denounce, advise, congratulate等。例如：
He impressed the manager as an honest man. (right)
He impressed the manager that he was an honest man. (wrong)
7. 否定的轉移
若主句謂語動詞為Think, consider, wuppose, believe, expect, fancy, guess, imagine等，其後的賓語從句若含有否定意義，一般要把否定詞轉移到主句謂語上，從句謂語用肯定式。例如：
I don』t think this dress fits you well.（我認為這件衣服不適合你穿。）
三．表語從句
表語從句在復合句中作表語的名詞性從句，放在系動詞之後，一般結構是「主語＋連系動詞＋表語從句」。可以接表語從句的連系動詞有be, look, remain, seem等。引導表語從句的that常可省略。另外，常用的還有the reason is that… 和It is because 等結構。例如：
1) The question is whether we can make good preparation in such a short time.
2) This is why we can』t get the support of the people
3) But the fact remains that we are behind the other classes.
4) The reason he is late for school is that he missed the early bus.
四．同位語從句
同位語從句就是在復合句中作名詞的同位語的名詞性從句。
1. 同位語從句的功能
同位語從句對於名詞進一步解釋，說明名詞的具體內容，一般由that引導，例如：
1) The king』s decision that the prisoner would be set free surprised all the people.
2) The order that all the soldiers should stay still is given by the general.
2. 同位語在句子中的位置
同位語從句有時可以不緊跟在它所說明的名詞後面，而是被別的詞隔開。例如：
He got the news from Mary that the sports meeting was put off.
3. 同位語從句與定語從句的區別
(1) 定語從句中的that既代替先行詞，同時以在從句中作某個成分（主語或賓語），而同位語從句中的that是連詞，只起連接主句與從句的作用，不充當句中任何成分。
(2) 定語從句是形容詞性的，其功能是修飾先行詞，對先行詞加以限定，描述定的性質或特徵；同位語從句是名詞性的，其功能是對名詞進行補充說明。例如：
1) The news that he told me is that Tom would go abroad next year.（他告訴我的消息是湯姆明年將出國。）（第一個that引導的從句是定語從句，that在從句中作賓語）
2)The news that Tom would go abroad is told by him.（湯姆將出國的消息是他講的。）（同位語從句，that在句中不作任何成分）
http://www.iselong.com/English/0001/1382.htm
這里也有
http://www.lme.com.cn/Article/FREE_YY/YFBD/200485144806.asp
http://www.yscbook.com/Article/jiaoxi/200605/1291.html