unusual是什么意思

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主语从句定义：在句子中担当主语的是一个从句，这个从句就叫做主语从句。

主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而

本身放在句子末尾。

主语从句主要有三类：

（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。

Thatyouwillwinthemedalemsunlikely.

Thatyouaresoindifferentbothersme.

Thatshesurvivedtheaccidentisamiracle.

（2）用连词whether引导的主语从句:whether有含义(是否),在句中不做成分,不可以省。

Whethersheiscomingornotdoesn’tmattertoomuch.

（3）用连接代词引导的主语从句(在由连接代词who,who,whom,which,what,

whoever,whomever,whichever,whatever引导的名词性从句中，其连接代词在句中起名

词性作用，担当一定成分).

Whatyouneedismorepractice.

WhatIwanttoknowisthis.

Whateverwedoistorvethepeople.

（4）用连接副词when,where,why,how引导的名词性从句(其连接副词有含义,在句中作状

语。)

eg:Whereweshouldleaveitisaproblem.

Whentheywillcomehasn’tbeenmadepubic.

ATTENTION

做形式主语,而将主语从句放在句末（尤其是当谓语较短时）。

例如：Thatlighttravelsinstraightlinesisknowntoall.

=Itisknowntoallthatlighttravelsinstraightlines.

Whentheplaneistotakeoffhasnotbeenannounced.

=Ithasnotbeenannouncedwhentheplaneistotakeoff.

(当what引导的主语从句表示“…的东西”时，一般不用it作形式主语。)

Whathewantsisabook.他想要的是本书。

Hasitbeenttledwhowillbenttocarryoutthetask?

固定用法和译法

（1）Itis+名词+从句

Itisafactthat… 事实是……

Itisgoodnewsthat………是好消息

Itisaquestionthat………是个问题

Itiscommonknowledgethat………是常识

类似的名词还有：apity；awonder；agoodthing；nowonder；surpri等。

例如：Itisamysterytomehowitallhappened.

Itiscommonknowledgethatthewhaleisnotafish.

ItisnosurprithatBobshouldhavewonthegame.

（2）Itis+形容词+从句

Itisnecessarythat… 有必要……

Itisclearthat… 很清楚……

Itislikelythat… 很可能……

Itisimportantthat… 重要的是……

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类似的形容词还有：strange;natural;obvious;true;good;wonderful;possible;unlikely;

quite;unusual;certain;evident;worth-while;surprising;interesting;astonishing,

etc.

Itisobviousthatconductorsandinsulatorsarebothimportantinindustry.

Itisdoubtfulwhethershewillbeabletocome.

Itwasreallyastonishingthatherefudtotalktoyou.

Itisntialthatheshouldbeherebytheweekend.

Itemsobviousthatwecannotgoonlikethis.

（3）Itis+过去分词+从句

Itissaidthat… 据说……

Itisreportedthat… 据报道……

Ithasbeenprovedthat… 已证明……

Itmustbeprovedthat… 必须指出……

类似的过去分词还有：known;estimated;expected;believed;thought;hoped;noted;

discusd;required;decided;suggested;demanded;madeclear;foundout,etc.

Itisthoughtthatheisthebestplayer.

Itistimatedthatthevais2000yearsold.

Itisudtobethoughtthatanewstarmustbeduetoacollisionbetweentwostars.

Ithasnotbeenmadeclearwhenthenewroadistobeopenedtotraffic.

ItdoesnotmatterifImisdmytrain,becauthereisanotherlater.

IthappenedthatIsawhimyesterday.

当“及物动词+宾语”较短时，也可用这种结构。

ItshockedmethatPeterdidnottellanybodywherehewas.

Itdoesnotinterestmewhetheryougoornot.

2.只用whether不用if引导主语从句.

主语从句三要点

请观察下列句子，注意划线部分句子的意义及用法。

rpridmemostwasthatthelittlegirlcouldplaytheviolinso

well.

lgototheconcertisnotknown.

ewaschonmadeusveryhappy.

rshewillcomeornotisstillaquestion.

ooktheywillchooisstillunknown.

shallholdoursportsmeetisnotdecided.

’sstrangethatheknowsnothingaboutit.

itythatshehasmadesuchamistake.

idthatPresidentJingowillvisitourschoolnextweek.

[小结归纳]

(一)语序

主语从句使用陈述语序，其通常结构为“引导词+主语+谓语+其他成分”；但当

连接代词同时充当从句主语时，其结构为“连接代词+谓语+其他成分”，如句1、

2。

(二)引导词

①that引导主语从句时无词义，也不充当任何成分，但通常不可以省略，如句3；

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②whether引导主语从句时意为“是否”，通常不能用if来代替,如句4；

③可以引导主语从句的连接代词主要有：who,whom,who,what,which,

whatever,whoever等，如句5；

④可以引导主语从句的连接副词主要有：where,when,how,why等，如句6。

(三)常见句型

有时为避免句子头重脚轻，常用it作形式主语，代替主语从句放在句首，而把主语从

句置于句末。常用句型如下：

①It+be+形容词+that从句，如句7;

②It+be+名词+that从句，如句8;

③It+be+动词的过去分词+that从句，如句9。

[即学即用]

I.用适当的词填空，使句子意思完整。

1.______hedidn’tattendthemeetingyesterdaywasn’tquiteclear.

eignMinistersaid,“Itisourhope______thetwosideswillwork

towardspeace.”

3.______teamwillwinthematchisstillunknown.

4.______comestothepartywillreceiveaprent.

5.______Maryhasleftisstillaquestion.

’sreported______threepeoplewerekilledintheaccidentandfivewere

hurtbadly.

7.______hesolvedtheproblemsuccessfullyinterestedallofus.

llythink______wecan’tgetemsbetterthanwhatwehave.

act______Englishisbeingacceptedasaninternationallanguage.

10.______istobenttheretosolvetheproblemhasn’tbeendecided.

II.下列各句中均有一处错误，请改正。

eoldman’ssonwantedtoknowwaswherethegoldhadbeen

hidden.

portedwhenChinahassuccessfullyntShenzhouVIspaceship

intospace.

nfinishhistaskontimeisofgreatimportance.

rthe2008OlympicGameswillbeheldinBeijingexcitedthewhole

nation.

angLiweisucceededincirclingtheearth,whichourastronauts

desiretodoiswalkinspace.

erleavestheroomlastoughttoturnoffthelights.

ywillsolvetheriousproblemtodayhasnotbeendecided.

llwintheEnglishcompetitionisstillaproblem.

springsportsmeetwillbeheldornotthisweekisnotknownyet.

’sstrangewhenheshouldhavegoneawaywithouttellingus.

主语从句学习指导

[寻规找矩]请观察下列句子，注意主语从句的用法。

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eearthtravelsroundthesunisawell-knownfact.

certainwhethertheartistcandoitornot.

lacttheleadintheplayhasnotbeendecidedyet.

heyoungmanhasgoneisnotknown.

tyetdecidedwhenandwherethetestwillbegiven.

[归纳总结]

1.引导主语从句的词有连词that,whether；连接代词who,who,whom,

whoever,what,which等；连接副词where,when,whenever,wherever,how,

why等。

2.有时用it作形式主语，将主语从句后置。

[常见错误展示]下列各句均有一处错误，请改正并分析错误的原因。

ravelsfasterthansoundiscommonknowledge.

’scomingornotdoesn’tmattermuch.

eprofessorsaidisofgreatimportance.

illthetreesbeplantedhasnotbeendecided.

erwhobreakstherulewillbepunished.

dwherethemeetingwillbeheldstillremainaquestion.

reyourproblemsayearagohasnowbecomemine.

equestedthateveryonemadeaspeechatthemeeting.

[高考链接]从A、B、C、D四个选项中选出可以填入空白处的最佳选项。

1.____wantstostayinahotelhastopaytheirownway.(浙江2008)

2.____mattersmostinlearningEnglishinoughpractice.(2007全国卷Ⅱ)

3.____fashiondiffersfromcountrytocountrymayreflectthecultural

differencesfromoneaspect.(上海2002春)

4.____we’llgocampingtomorrowdependsontheweather.(NMET1996)

主语从句练习

单项选择题

1._____asmuchasone-fifthofalltimberharvestedisnotud.

imate

timatedthat

2._____wasonceregardedasimpossiblehasnowbecomeareality.

3._____wehaveachievedisattributedtotheguidanceofourparents.

4._____yousaynowcan’tmakeupforwhatyou’vedone.

gh_____happenedinthisdevelopedcountrysoundslikescience

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fiction,it

couldoccurelwhereintheworld.

6._____shehadforgottentotakehernotebook.

urredthat

rredtoherthat

ethat_____shesaidiswrong.

ourwayintheforest,and_____mademattersworwasthatit

was

gettingdark.

9._____occurredtohimthathehadforgottentolockthedoorwhenheleft

home.

10._____ornotisstilluncertain.

’ｓcoming

rhe’ｓcoming

’ｓ_____he’llbeabletocome.

ulwhether

_____thatthebridgehaxistedformorethanthreecenturies.

13._____hesawbothsurpridandfrightenedhim.

14._____isaspellofwarmsunshine.

lweneed

allneed

15._____isapitythatheshouldfeelsoupt.

16._____aspoonfulofsoilcantellussomuchaboutthestructureand

earlyhistoryofthemoon.

emarkably

markable

17._____younominatewillbeelected.

’ｓ

18._____bookyouborrowmustbereturnedwithinaweek.

’ｓ

19._____istroublingmeisthatIdon’thavemuchexperiencein

internationalcommerce.

20._____theywilgotheretotryanotherexperimenthasnotbeendecided

yet.

根据提示，完成句子。

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1.__________________________________hasn’tbeendecidedyet.(pick)

谁将去接他还没有确定。

2.__________________________________remainsunknown.(finish)

我们是否能按时完成工作还不知道

3._____________________________________isnoneofmybusiness.(like)

你喜不喜欢他都与我无关。

4._________________________________________isbeingdiscusd.(abroad)

他将何时出国正在讨论之中。

5.____________________________inlearningEnglishinough

practice.(matter)

英语学习中最重要的是足够的练习。

iedherabit______________________________________________.(turn)

她的头发正在变白让她有些担忧。

angLiweisucceededincirclingtheearth,

___________________________ourastronautswalkinspace.(desire)

杨利伟成功地环绕地球后，我们希望的是宇航员在太空漫步。

8.________________________________________shouldbepunished.(break)

任何违法的人都应该被惩罚。

9.___________________wecanlearnfourforeignlanguagesatthesame

time.(em)

我们能同时学四门外语似乎不可能。

10._______________________________wasthatmorethan90%ofthestudents

hadbeenadmittedtothekeyuniversities.

让这所学校感到自豪的是超过90%的学生被重点大学录取了。

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主语从句

1—5DDBBB

6—10DDDBD

11—15DCCDD

16—20CACDA

lpickhimup

rwecanfinishtheworkontime

ryoulikehim(ornot)

willgoabroad

ttersmost

rhairwasturninggrey

’sdesiredthat

rbreaksthelaw

simpossiblethat

detheschoolproud

Key:

I．r

II．→→that

→r→That

→what

er→Whoever

→→Who

→→that

[解析与拓展]

1.在句首加That（并将Light改为light）。that虽无词义但引导主语从句位于句首时不能

省略。

2.将If改为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.将That改为What。that引导主语从句时无词义。Whattheprofessorsaid表示“教授

所说的”。

4.将will置于trees之后。主语从句要用陈述句语序。

5.将Nomatterwho改为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.将remain改为remains。主语从句表示单一概念时，谓语要用单数形式。

要改为have。主语从句表示复数概念时，谓语要用复数形式。

8.将made改为（should）make。在“Itisrequested/ordered/suggested+that

从句”中，从句要用虚拟语气，即谓语用“should+动词原形”，should可省略。

1-4CABB

21-25BDCAC

26-30DAADA

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31-35BDDCC

36-240BCACB

（二）DCBADBACDABBCAB

（三）CDCABDDCCBDABADABCAB

（四）CADCCABDABACCBDBDDBA