洋洋和洒洒
高考对冠词的考查集中在基本用法上，主要既反映在对泛指、特指及固定 短语 冠词的考查。抽象名词、物质名词的具体化依然是高考的重点、难点。接下来是我为大家整理的 高三英语 知识考点整理概括，希望大家喜欢!
高三英语知识考点整理概括一
1someone双语例句
Someone explain that one to me!
有人解释说，一到了我!
Someone must be at the back of this.
这事一定有人在背后捣鬼。
He found someone on him.
他发现有人在跟踪他。
2常用不定代词
some(something，somebody，someone)，any(anything，anybody，anyone)，no(nothing，nobody，noone)，every(everything，everybody，everyone)，all，each，both，much，many，(a)little，(a)few，other(s)，another，none，one，either，neither等。
高三英语知识考点整理概括二
高中英语语法中的省略现象
在英语语言中，为了使语言简洁明了，重点突出或上下文紧密相连，可以省去某些 句子 成分而保持句子愿意不变，这种语言现象称之为省略。现就英语中的种.种省略现象分析如下：
一、并列复合句中的省略
在并列句中后边的分句可以省略与前边分句中相同的成分。如：
a) The boy picked up a coin in the road and (the boy ) handed it to a policeman. 这个男孩在马路上拾起一枚硬币并把他交给了警察。
b) Your advice made me happy but(your advice made) Tom angry .你的建议使我高兴但使汤姆生气。
c) Tom must have been playing basketball and Mary (must have been)doing her homework. 汤姆肯定一直在打 篮球 ，玛丽一直在写作业。
d) Gao Xiumin was born in 1959 and Fu Biao (was born) in 1963.高秀敏出生于1959年，傅彪出生于1963年。
二、主从复合句中的省略
1.状语从句中的省略
一般说来省略现象多出现在下列五种状语从句中：由 when ,while ,as ,before, after , till, until, once等引导的时间状语从句;由whether ,if , unless 等引导的条件状语从句;由though , although ,even if ,whatever等引导的让步状语从句;由 as ,than 等引导的比较状语从句;由as, as if , as though 等引导的方式状语从句。上述状语从句在省略时应遵循下面原则：
1) 当状语从句的主语与主句的主语一致时，可以省略状语从句的主语和系动词be，这时从句中可出现如下结构：(1) 连词(as, as if , once)+ 名词; (2) 连词( though, whether , when)+形容词;(3) 连词(whether, as if ,while )+介词短语;(4) 连词(when , while , though )+ 现在分词; (5) 连词
(when ,if ,even if ,unless ,once ,until, than , as ) + 过去分词; (6) 连词(as if ,as though ) + 不定式。如：
a) Once (he was)a worker ,Pang Long now becomes a famous singer .庞龙曾经是个工 人，现在变成一位著名的歌手。
b) Work hard when (you are) young ,or you'll regret.趁年轻要努力学习，要不然你会后悔的。 c) He looked everywhere as if (he was)in search of something .他到处看似乎在找什么东西。 d) While (he was) holding talks with President Hu Jintao ,US President George W. Bush thanked China for its important role in the Six-Party Talks.美国总统布什在与胡锦涛同志会谈时，感谢中国在六方会谈中起的重要作用。
e) The exhibition is more interesting than (it was) expected .这次展览比被预料的有趣的多。 f) Olympic gold medallist hurdler Liu Xiang opened his lips as if (he were) to speak。奥林匹克金牌获得者 跨栏 运动员刘翔张开嘴好像要说什么。
注意：
1) 当从句的主语和主句的宾语一致时，间或也有这样的省略,如：
Her father told her to be careful when (she was)crossing the street.当她过马路时父亲告诉她要当心。
2) 当从句的主语是 it，谓语动词中又含有系动词be 时 ，可以把it和系动词be一起省略。此时构成连词(if , unless ,when , whenever)+形容词的结构。如：
Unless (it is) necessary ,you'd better not refer to the dictionary.如果没有必要，你最好不要查字典。
2.定语从句中的省略
1) 一般说来，在限制性定语从句中，作宾语的关系代词 that ,which , whom 可以省略;如：
Is this reason (that) he explained at the meeting for his carelessness in his work?这就是他在会上解释他工作中粗心的原因吗?(2002上海春季)
而在非限制性定语从句中作宾语的关系代词 which , whom 不可以省略。试比较：
Tom (whom) you saw yesterday fell ill.( whom可以省) 你昨天见到的汤姆病倒了。
Tom , whom you saw yesterday ,fell ill. ( whom不可以省) 汤姆病倒了，你昨天见到他了。
2)在口语和非正式用语中，关系副词when ,where , 和 why 经常用that 来代替，甚至还可省略。如：
a) This is the first time (when/that)he had trouble with the boss.这是他第一次麻烦老板。 b) He wants to find a good place (where/that) we can have a picnic during the “golden week ”holiday .他想找一个能在黄金周期间野餐的好地方。
c) Could you tell us the reason (why/that)he was so unhappy ? 你能告诉我们他为什么如此不高兴吗?
3)当先行词为表示方式的 the way 时 ，从句不能用 how 来引导 ，应该用that 或 in which ，或将它们全部省略。如：
I don't like the way (that/in which) you laugh at her.我不喜欢你嘲笑他的行为。
3.宾语从句中的省略
1)在及物动词后面所接的宾语从句中，连词that 一般可以省略;但如果及物动词后面是由that引导的两个或两个以上的并列的宾语从句 ，那么只有第一个that可以省略。如：
a) I think (that) the reform of the renminbi's exchange rate is necessary. 我认为人民币兑换率的改革是必要的。
b) He said (that)the Anti-secession law had been passed and that President Hu Jintao had signed a presidential order 他说《 反分裂国家法》已被通过，而且胡锦涛主席已签署了主席令。
2)由 which , when ,where , how,和 why 引导的 宾语从句，可以全部或部分省略。如：
a) I know that NBA star Yao Ming will come to our city but I don’t know when (he will come to our city).我知道NBA明星要到我们城市来但我不知道他什么时候来。
b) He wants to move abroad but his parents wonders why (he wants to move abroad)他想搬迁到国外但他的父母想知道为什么。
4.在与suggest ,request ,order ,advise 等词相关的名词性从句中，须用虚拟语气形式“should +动词原形”，should可以省略。如：
Chirac, President of the Republic of France suggested that the China-France Culture Year (should) last long in various forms.法国总统希拉克建议中法 文化 年以各种各样的形式长期持续。
5.主句省略多用于句首。如：
(It is a ) Pity that I didn’t go to Mary's birthday party yesterday.很遗憾，我昨天没有去参加玛丽的生日聚会。
6.在答语中，主句可全部省略。如：
—Why were you absent from school last Friday ?—(I was absent from school)Because my mother was ill. —上周五你为什么没有上学? —因为我妈妈病了。
三、简单句中的省略
1.省略主语
1)祈使句中的主语通常被省略 如：
(You) Open the door, please. 请开一下门。
2) 其它 省略主语多限于现成的说法 如：
a) (I) Thank you for your help 谢谢你的帮助。
b) (It)Doesn’t matter.没关系。
2.省略主谓语或主谓语的一部分 如：
a) (There is) No smoking. 禁止抽烟
b) (Is there)anything else ? 还有其他事吗 ?
c) (You come)This way please.请这边走。
d) (Will you) Have a smoke ? 抽烟吗 ?
3.省略宾语 如：
—Do you know Mr. Li ? 你认识李先生吗?— I don’t know (him.) 我不认识他
4.省略表语 如：
—Are you thirsty ? 你30岁了吗? Yes , I am (thirsty). 是的，我是。
5.同时省略几个成分 如：
a) —Are you feeling better now? 你觉得好些了吗 ?—(I am feeling ) Much better (now) 好多了。
b) (I wish) Good luck (to you) .祝你好运/祝你顺利。
四、动词不定式省略，只保留to 的场合
1.不定式作某些动词的宾语时，这些动词常见的有：love, like, care, wish, hope, expect, prefer, refuse, mean , try , oblige , advise , persuade , agree , want , afford , forget , remember , try , manage等。如：
a)— You should have thanked her before you left . —I meant to ,but when I was leaving I couldn’t find her anywhere.—你本该在离开前谢谢她。—我本打算这么做，但当我就要离开的时候我却找不到她了。(2000上海春)
b) You can do it this way if you like to .如果你想做，你可以这么做。
2.不定式作某些动词的宾语补足语或主语补足语时，这些动词常见的有：ask , tell ,advise, force, persuade, wish, allow, permit , forbid ,expect, order ,warn 等。如 ：
a) The boy wanted to ride his bicycle in the street ,but his mother told him not to. 男孩想在街上骑他的自行车，但他母亲不让。(NMET1995)
b) She wants to come but her parents won’t allow her to (come). 她想来，可是她父母不让。
3.不定式在句中作某些形容词的状语时，常见的形容词有：happy, glad ,eager , anxious , willing , ready 等。如：
— I will be away on a business trip .Could you mind looking after my cat ? — Not at all.I would be happy to (look after your cat). —我要出差，你能帮我照顾一下我的猫吗?—没关系，我很愿意。
4.不定式作某些复合谓语时，常见结构如：be able to, be going to, have to, ought to, used to等。如：
He doesn’t like fish but he used to 他现在不喜欢吃鱼，但过去喜欢。
五、动词不定式to 的省略
1.主语部分有to do ,系动词 is 或 was 时 ，作表语的不定式通常省去to。如：
The only thing you have to do is press the button.你必须做的惟一事情是按按钮。
2.作介词but ,expect ,besides 的宾语，前面又有实意动词 do时，不定式通常省去to. 如： He said that Chen Shuibian had nothing to do except push a pro-“independence” timetable.他说陈水扁除了推进支持“独立”的时间表外，什么也没有做。
3.主语部分暗含to do，表语中的不定式通常省去to。如：
All I want (to do) is go to school and study hard .我想要(做)的就是上学，努力学习。
4.当两个或多个不定式并列时，其后的不定式符号可以省略，但有对比关系时不可省略。如： It is easier to say than to do . 说起来容易，做起来难。
5.在would rather?than? 等结构中，不定式符号常常要省略. 如：
I would rather stay at home than go to see a film.我宁愿呆在家也不愿去看电影。
6.在see ,watch ,notice ,hear, listen to ,look at ,feel ,have, make, let ,observe 等词后作宾语补足语时省略不定式符号to;why (not) do 结构 中, 不定式不带to。如：
a) I saw her enter the room. 我看见她进入了房间
b) Why not join us ?为什么不加入到我们的行列里来呢?
六.其他一些省略结构
1.名词所有格修饰的名词，若表示住宅、店铺、教堂或上下文已暗示或明确指出过的事物时，常常可以省略。如：
We spent the weekend at the Mary's. 我们在玛丽家过的周末。
2.What和 how引导的感叹句中，常可省略主语 it 和be动词 如：
a) What a wonderful victory (it is ) for Tom ! 这对Tom来说是个多么大的胜利呀!
b) How beautiful (it is ) to be treated like a normal child. 被当作一个正常孩子对待对他而言是多么美妙的一件事呀。
高三英语知识考点整理概括三
主谓一致练习
1. About 60 percent of the students _____ from the south, the rest of them _____ from the north and foreign countries.
A. are/is B. are/are C. is/are D. are
2. Half of the workers here _____ under 30 _____.
A. is/years B. are/year old C. is/years old D. are/years of age
3. Now Tom with his classmates _____ football on the playground.
A. play B. are playing C. plays D. is playing
4. The number of pages in this dictionary _____ about two thousand.
A. are B. has C. have D. is
5. Thirty dollars _____ too expensive.
A. are B. is C. were D. be
6. The audience _____ so large that no seat was left unoccupied in the great hall.
A. is B. are C. was D. has
7. The secretary and principal _____ at the meeting now.
A. are speaking B. is speaking C. were making a speech D. have a speech
8. "If anybody _____, please put down _____ name," said the teacher to the monitor.
A. wants to buy the book/his B. want to buy the book/their
C. will buy the book/one's D. wants to have the book bought/her
9. Nothing but one desk and six chairs _____ in the room.
A. are B. is stayed C. is D. are left
10. Having arrived at the station, _____.
A. it was found that the train had left &nb, sp; B. th, e trai, n had left
C. the train was found left D. he found that the train had left
11. Between the two roads _____ a TV tower called "Skyscraper Tower".
A. stands B. standing C. which stands D. stand
12. Either of you _____ going there tonight.
A. will B. was C. is D. are
13. You as well _____ right.
A. I are B. I am C. as I am D. as I are
14. All but Dick _____ in Class Three this term.
A. are B. is C. were D. was
15. -- Shall I wait here for three hours?
--Yes. Three hours ___, __ t, , , , , o wait for such a doctor.
A. are not very long for you B. is not long enough fo, , , , , r you
C. was not long enough for you D. will be too long for you
16. Where to get the materials and how to get them _____ at the meeting.
A. have not discussed B. have not been discussed
C. has not discussed D. has not been discussed
17. I took mathematics and physics because I think that _____ very important for me to make further research in this field.
A. what is B. they are C. this D. which are
18. Every student and every teacher _____.
A. are going to attend the meeting B. have attended the meeting
C. has attended the meeting D. is attended the meeting
19. Three fourths of the bread _____ by Bob, and the rest of the bread _____ left on the table.
A. was eaten/were B. were eaten/was C. were eaten/were D. was eaten/was
20. This pair of shoes _____.
A. is her B. is hers C. are hers D. are her
21.There ______ no life on the moon.
A. is said to have B. are said to have C. is said to be D. are said to be
22.A group of ______ are eating ______ and ______ at the foot of the hill
A. sheep; grass; leaves B. sheeps grasses leaves
C. sheep; grass leaf D. sheeps grass leafs
23.My family raise a lot of _______, including two______.
A. cattles cows B. cows cattle C. cattle cows D. cow, cattles
24.What he says and what he does_______.
A. does not agree B. do not agree C. does not agree with D. not agree
25.The boy and the girl each ______ toys.
A. have their own B. has their own C. have her own D. has her own
26.She is the only one among the ______ writers who ______stories for children.
A. woman, writes B. women write C. women writes D. woman write
27.The railway station is ______from our school.
A. two hour`s drive B. two hours` drive C. two hour drive D. two hours drive
28.Mike and John`s ______.
A. father is a teacher B. fathers are teachers
C. father are teachers D. fathers are teacher
29.A great deal of talking and listening that ______ under casual circumstance may seem to be aimless.
A. is occurred B. are occurred C. occurs D. occur
30._______ the classroom needs to be cleaned.
A. Either the offices or B. The offices and C. Both the office and D. The office and
31.Three-fourths of the homework ______today.
A. has finished B. has been finished C. have finished D. have been finished
32.More than 60 percent of the world’s radio programmes ______in England.
A. is B. was C. are D. be
33. ______work has been done to improve the people`s living standard
A.A great deal of B.A great many C.A large number of D.Many
34.The rest of the magazines ______ within half an hour.
A.is sold out B.are sold out C.was sold out D.were sold out
35.There ______ a lot of sugar in the jar.
A. has B.have C.is D.are
36. “All ______present and all ______going on well”, our monitor said.
A.is is B.are, are C.are is D.is are
37.Yesterday the League secretary and monitor ______ asked to make a speech at the meeting.
A.is B.was C.are D.were.
38.Mary as well as her sisters ______ Chinese in China.
A.are studying B.have studied C.studies D.study
39.The rich______ not always happy.
A.are B.is C.will D.may
40. ______can be done ______done.
A.All, have been B.All that ,have been C.All has D.All that ,has been
41.Either of the plans ______equally dangerous.
A.are B.is C.has D.have
42.The police ______the murderer everywhere when he suddenly appeared in a theatre.
A.is searching B.were searching for
C.are searching D.was searching for
43.Your trousers ______dirty, you must have______ washed.
A.is it B.are it C.are them D.is them
44.The Olympic games ______held every four ______.
A.is years B.are years C.is year D.are year
45.He is the oly one of the students who______elected.
A.are B.have C.has D.is
46. ______a good enough price for this book
A.Two yuans are B.Two yuan are C.Two yuans is D.Two yuan is
47.No bird and no beast ______in the lonely island
A.are seen B.is seen C.see D.sees
48.Every means ______prevent the water from______
A.are used to polluting B. get used to polluting
C.is used to , polluted D.is used to ,being polluted
49.Each of the ______in the ship.
A.passenger has his own room B. passengers have their own room
C.passenger have their own room D.sengers has his own room
50.What we need ______good textbooks.
A.is B.are C.have D.has
51.What you said just now______to do with the matter we are discussing.
A.have something B.has something C.had something D.was something
52.Either your parents or your elder brother ______to attend the meeting tomorrow.
A.is B.are C.are going D.have
53.Neither of the novels which ______popular with us ______been translated into Chinese.
A.are has B.are have C.is have D.is has
54.Every boy and every girl ______to attend the evening party.
A.wish B.wishes C.hope D.are hoping
55._______ has been done.
A.nety—nine percents of the work B. Half of what he promised
C. Two-fifths of the articles D. Three quarter of the business
答案：
1-5 BDDDB 6-10 ABACD 11-15 ACDAB 16-20 DBCDB
21-25 CACBA 26-30CBACA 31-35 CCADC 36-40CBCAD
41-45 BBCBD 46-50 DBDDB 51-55 BAABB
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2. 高考英语知识点总结归纳
3. 高考英语知识点考点归纳
4. 高考英语知识考点汇总
5. 高考英语知识点汇总大全
6. 英语考点知识归纳
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月儿丸丸
英语是不能一步登天的，我们必须要学会一步一个脚印慢慢积累。因为人的大脑不容易像计算机一样高效率做很多任务，下面是我为大家整理的 高三英语 知识点，欢迎阅读!
一、就近一致原则
1.由or，not
only...butalso...，neither...nor...，either...or...，whether...or...，not...but...等连接两个或两个以上的并列主语时，通常根据就近一致原则，谓语动词要与离它最近的主语在数上保持一致。
Neither his parents nor I am able to persuade him to change his mind.
2.here/there引导一个 句子 而主语又不止一个时，通常根据就近原则，谓语动词要与离它最近的主语在数上保持一致。
Here is a ruler，a few pencils and two copybooks.
二、意义一致原则
1.谓语动词必须用单数的情况
(1)表示学科的名词以及works(工厂)，news(消息)等作主语时，虽然本身为复数形式，但表示单数意义时，谓语动词仍用单数。
Politics is his favorite subject.
(2)表示某些组织机构的名词、书/报名、国名、地名等作主语时，虽然形式上是复数，但所表示的意义是单数，所以谓语动词用单数。
Do you know when the United Nations was set up?
2.谓语动词必须用复数的情况
表示总称意义的名词，如people，police，public，cattle等作主语时，谓语动词用复数。
The police are searching for the murderer.
3.谓语动词的形式依据主语表示的意义而定
(1)集体名词，如family，class，group，team，club，company，government，population等作主语时，谓语动词的形式根据其在语境中表示的意义而定。当其表示集体意义，强调整体概念时，谓语动词用单数;当其表示集体中各个组成部分，强调个体概念时，谓语动词用复数。
As far as I know，his family is not very large but the family are all musiclovers.
(2)“the+形容词/分词”表示“一类人”时，谓语动词用复数。
The poor were looked down upon in the old days.
三、语法一致原则
1.由and连接的两个名词作主语
(1)“a/the+名词单数+and+名词单数”表示一个人(双重身份)，谓语动词用单数。
The teacher and poet often gives lectures around the city.
(2)“a/the+名词单数+and+a/the+名词单数”表示两个人，谓语动词用复数。
The teacher and the poet have just arrived.
(3)“every+名词单数+and+every+名词单数”表示每一个人，谓语动词用单数。
Every boy and every girl has the right to receive education in ourcountry.
(4)通常由两个部件组成的物品如：a knife and fork (一副刀叉)等作主语，谓语动词用单数。
Bread and butter is not to his taste.
2.表示时间、数量、长度及价格的名词，尽管有时是复数形式但常被看作是一个整体，谓语动词用单数形式。
Is fifty pounds enough?
3.“分数/百分数+of+名词”作主语时，谓语动词的形式根据of后的名词的形式来定，如果名词是可数名词复数，谓语动词用复数形式;
如果名词是单数可数名词或不可数名词，谓语动词用单数形式。
Two-thirds of the books are about science.
Only 30% of the work was done yesterday.
一、全部倒装
1.There be句型：可以用在这类句型中的动词除b。
外，还可用live，happen，exist，remaln，stand等作这类句型的谓语。例如：
(l)There are many students in the classroom
(2)Long long ago there lived a king who loved horsesvery much.
2.Here/there/now+vi(常为come，go)+主语(必须是名词)。此句型中here/there是用来唤起注意，意为：
喂，注意了。例如：Here comes Mary.可转换为：I can seeMary coming.
here在句中也可接系动词，例如：Here is John3.then引起谓语为come，follow的句子，例如：
(l)Then came a new difficulty.然后产生了一个新的困难。
(2) Then followed eight years of the Anti-JapaneseWar.接着是八年抗战。
4- out，in，up，down，away之类的副词作状语放在句首，主语比较长，也就是说主语不能是很短的人称代词，谓语为不及物动词come，go，run，rush等。句式为：副词_LVi.+主语(必须是名词)。例如：
Away went the boy.
5.介词 短语 作状语放在句首，谓语为不及物动词，主语比较长，也就是说主语不能是很短的人称代词。句式为：介词短语+Vi.+主语(必须是名词)。例如：
In the middle of our school stands a high building.
6.表语放在句首，表语常为形容词、分词、副词、介词短语。要求主语比较长，也就是说主语不能是很短的人称代词。句式为：表语十系动词十主语(必须是名词)。例如：
(1) Very important in the farms' life is the radioweather report.
(2) Present at the meeting were Professor White,Professor Smith and many other guests.
7.直接引语中间或后面表示某人说这句话的插入语(特别是谓语较短时)，例如：“Help! Help!”cried the littlegirl.小姑娘叫道：“救命!救命!”
如果主语没有谓语长，或是它后面有宾语，主语就仍然放在前面，例如：“That man is a famous film star，”XiaoYang told me in a whisper.小杨低声告诉我说：“那个人是著名的电影明星。”
二、部分倒装
1.only+副词/介词短语/状语从句置于句首，例如：
Only then did I realize the importance of English.
注意：
①在only+状语从句十主句结构中，主句用倒装结构但从句用正常语序。
②only修饰主语，不倒装。
2.否定词(短语)开头的句子，表示否定意义的副词never, nor,neither.表示半否定意义的副词hardly，few，seldom，little，含有no和not的词组如by no means(绝不)，in no time(很快)，at no time(在任何时候都不，在任何情况下都不),not until,not only..but also...no sooner...than.
hardly.一when，scarcely when等情况下，结构为“否定词十助动词/情态动词十主语十其他”。例如：
(1) Never have I been in this city.
(2) Little/Seldom d0 1 watch TV.
(3)Not until I began to work did I realize how muchtime I had wasted.
注意：①关联词的搭配;②前一分句倒装，后一分句不倒装。
3.以so开头，用“so+助动词/情态动词/系动词十主语”表面;前面叙述的肯定情况也适合于另一个人或物，译作“也，同样，也如此”。表示前面叙述的否定情况也适合于另一个人或物，用“neither/nor+助动词/情态动词/系动词十主语”。译作“也不是，也没有”。例如：Society has changedand so have the people in it.社会变了，人也变了。
注意：
①当s0表示对前句内容的肯定、附和，或进一步强调前面所说的情况，或者赞同前面的说法译作“的确，正是”时应用自然语序：
-Tom works hard.
-So he does and so do you.
②倒装部分的助动词、情态动词、连系动词的时态和形式要与前句相一致，主谓一致的变化要与后面主语相呼应。例如：If you don't go, neither/nor shal] I.(If youdon't go,I shall not go.)注意：表示前面的多种情况也适合于另一人或物，或者既有肯定又有否定情况或涉及不同类型的动词时可用：
It is the same with something /somebody.或So it is withsomething/somebody.例如：She does well in English, butis poor in maths. So it is with Lucy.
4.引导让步状语从句结构为表语/状语/动词原形+as+主语十其他，例如：Hard as he tried，he didn，t succeed注意：表语前的名词无形容词修饰时，冠词要省略。
5.so+adj. /adv.放在句首，例如：So afraid was he inthe darkness that he didn't dare to move an inch.
6.如果虚拟条件句的谓语含有were，。hould，had，可以把if省略，而将这三个词放于条件句主语前构成倒装。
例如：If there should be a flood,what woulci we d07一Should there be a flood, what would we do?
7.频度副词及短语often，always，now and then，many8 tlme，e”ery other day等放在句首时，有时也倒装。例如：
Many a time has he come to comfort me.
8.某些表示祝愿的句子也用倒装语序，例如：
May you succeed.祝你成功!
1.定义：用作主语的从句叫做主语从句。
2.构成：关联词+简单句
3.引导主语从句的关联词有三类：
(1) 从属连词that。 如：That they were in truth sisters was clear from the facialresemblance between them.
很明显，她们确是亲姐妹，她们的脸型很相似。
(2) 从属连词whether。如：
Whether he’ll come here isn’t clear.他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever
连接副词 where, when, how, why。如：
What she did is not yet known.她干了什么尚不清楚。
How this happened is not clear to anyone.这事怎样发生的，谁也不清楚。
Whoever comes is welcome.不论谁来都欢迎。
Wherever you are is my home ---- my only home.你所在的任何地方就是我的家----我的家。
解释：
1.主语从句能用it作形式上的主语。
常以it作形式主语的句型有：
A.It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny,possible, likely, certain, probable, etc.)+that从句。如：
It is certain that she will do well in her exam.毫无疑问她考试成绩会很好。
It is probable that he told her everything.很可能他把一切都告诉她了。
B.It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise,etc.)+that从句。如：
It’s a pity that we can’t go.很遗憾我们不能去。
It’s no surprise that our team should have won the game.我们没赢这场比赛真意外。
C.It+be+过去分词(said, reported, thought, expected, decided, announced,arranged, etc.)+that从句。如：
It is said that Mr.Green has arrived in Beijing.据说格林先生已经到了北京。
It is reported that China has sent another man-made earth satellite intoorbit.
据报道中国又成功地发射了一颗人造地球卫星。
D.It+seem, happen等不及物动词及短语+that从句。如：
It seems that Alice is not coming to the party at all.Alice似乎不来参加晚会。
It happened that I was out that day.碰巧我那天外出了。
E.It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如：
It doesn’t matter whether she will come or not.她是否来这无关紧要。
It makes no difference where we shall have the meeting.我们在哪里开会毫无区别。
F.当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。如：
Is it true that the scientist will give us a lecture next week?下周那位科学家将给我们作 报告 是真的吗?
Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗?
G.当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。如：
How strange it is that the children are so quiet! 孩子们这么安静真奇怪!
2.注意连接代词whoever,
whatever, whichever等引导主语从句的含义
Whoever comes will be welcome.(whoever=the person who) 来的人将受到欢迎。
Whatever he did was right.(whatever=the thing that) 他所做的事情是正确的。
Whichever of you comes in will receive a prize.(whichever=anyone of youwho) 你们当中不论哪个进来将会得到奖
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