第04讲 状语从句-2023年新高二英语暑假课（外研版2019选择必修1）含解析

第04讲状语从句-【暑假自学课】2023年新高二英语暑假精

品课(外研版2019选择必修1)第04讲状语从句

《学与目标彳

ɪ,掌握常见状语从句的连词意思。

2.特殊连词和时态的关系以及省略句(必修3Unit6)。

［董基础知3

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状语是什么？

基本概念：

(1)概念：状语从句在复合句中作状语，修饰主句中的动词、形容词、副词等。

(2)句型特点：

状语从句可以放在主句之前，也可以放在主句之后。放在主句之前时，常用逗号与主句分开；放在主

句之后时，不用逗号。

2.分类及引导词

状语从句引导词

时间状语从句when,while,as,before,after,untɪl(till),assoonas,since

条件状语从句if,unless

原因状语从句because,as,since

方式状语从句Asif,theway

结果状语从句so...that...,such...that...

目的状语从句sothat,inorderthat

让步状语从句(hough,although,evenif,eventhough,nomatter...

比较状语从句than,as...as...

Q考点剖析

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考点一：时间状语从句

1)When/while/as

活学活用：Louiscomputergameswhenherbrotherphonedher.

A.playsB.isplaying

C.hasplayedD.wasplaying

Iwasabouttogoouttheteachercamein.

yearsgoby,Chinaisgettingstrongerandricher.

Thesonwashavingagoodmealathome,theparentswereworkinginthefields.

Ihadhardlyclosedmyeyessomeoneknockedatthedoor.

温馨小贴士：When常考结构：

beabouttodo...when/beonthepointofdoing...when

bedoing...when

...hadjustdone...when.../...hadhardly/scarcely...when

2)after/before/since

Jane,pleaseturnoffthelightsyouleavetheclassroom.

A.afterB.beforeC.untilD.since

3)until/till

一Hurryup!Thebusiscoming.

—Waitaminute.Don,tcrossthestreetthetrafficlightsaregreen.

A.untilB.after

C.whileD.since

4)assoonas,theminute.....

Tomwillcallmeassoonashehome.

A.getsB.hasgot

C.gotD.willget

4）表示“一….••就...”的从属连词：assoonas;theminute,thesecond,theinstant;immediately,directly,

instantly;nosooner...than...,hardly...when....

-DidyouremembertogiveMarythemoneyyouowedher?

-Yes,ɪgaveittoherIsawher.

A.whileB.themomentC.suddenlyD.once

5).可引导时间状语从句的time短语：everytime,eachtime,(the)nexttime,(the)Iasttime,thefirsttime,

anytime等.

IthoughtherniceandhonestImether.

A.firsttimeB.forthefirsttimeC.thefirsttimeD.bythefirsttime

6),Itbe...since/before/when...句型：

①“Itis/hasbeen+时间段+since从句谓语为终止性动词表示“自从……以来有多久了''；但若从句谓词是

延缓性动词时，则意为“(多久)不做……了”；

ItistwomonthssinceWecamehere.

Ithasbeenfiveyearssincehesmoked.

②"Itwillbe/was+时间段+before...”肯定句：表示“过……之后才……否定句：表示“没过……就……

③“Itbe+时间点+when...”表示“当...时,时间是....注意比较和强调句的不同。

练习：

①ItisalmostfiveyearsWesaweachotherlasttime.

A.beforeB.sinceC.afterD.when

②Thatwasreallyasplendidevening.It'syearsIenjoyedmyselfsomuch.

A.whenB.thatC.beforeD.since

［、,例1.【单句填空】

(用before,when,since,that填空)

1.Itwastwoyearsherealizedthetruth.

2.Itwillbetwoyearstheeconomicsituationimproves.

3.Itwastwoyearslaterherealizedthetruth.

4.Itis/hasbeentwoyearshelivedhere.

5.Itwasmidnighthearrivedhome.

6.Itwasatmidnighthearrivedhome.

7.Itwasnotuntilmidnighthearrivedhome.

考点二：条件状语从句

从属连词有：if,unless(=if...not),as/solongas,SUPPOSing(that)(如果),provided∕providing(that)(如果),in

case(假使),onconditionthat(在...的条件下)等。

2.【单句填空】

Ifyoureallyholdontoyourdreams,theytrueoneday.

A.cameB.comes

C.hascomeD.willcome

Iknowthemoneyissafe,Ishallnotworryaboutit.

A.EventhoughB.UnlessC.AslongasD.While

考点三：原因状语从句

原因状语because/since/asnowthatinthat

—Iseveryoneheretoday?

—No.Tomisathomehehasgotabadcold.

A.becauseB.ifC.untilD.unless

引导原因状语从句的从属连词有because,as,since,now（that）,when（既然），as,seeing（that）（由于）,considering

（that）,given（that）（考虑到）等。

温馨提示:for引导的原因状语从句不放在句首。

⅛j3.【单句填空】

©Parentsshouldtakeseriouslytheirchildren,srequestsforsunglasseseyeprotectionisnecessaryinsunny

weather.

A.becauseB.thoughC.unlessD.if

②everybodyknowsaboutit,ɪdon,twanttotalkanymore.

A.ForB.EvenC.SinceD.However

考点四：地点状语从句

引导词：where（在。。。的地方）或WhereVer（在。。。的任何地方）

【针对练习】

Thefamousscientistgrewuphewasbornandin1930hecametoShanghai.

A,whenB,wheneverC,whereD.wherever

区别：Where引导的定语从句和状语从句

You,dbettermakeamarkwhereyouhaveanyquestions.从句

You,dbettermakeamarkattheplacewhereyouhaveanyquestions.从句

考点五：目的状语从句

sothat...inorderthat...

[∖产5.【单句填空】

Theteacherspeaksveryloudlyallthestudentscanhearher.

A・sothatB.because

C.sinceD.when

考点六：结果状语从句so...that....Such...that...

Patternshift:Thatlessonissodifficultthatnobodycanunderstandit.

结果状语从句常由So…that或SUCh…that引导，掌握这两个句型，首先要了解So和SUCh与其后的词的搭

配规律。

so+adj./adv.+that...

so+adj.+a/an+n.（单）÷that...

so+many/much/few∕little（少）+that...

{such+a∕an+adj.+n（单）+that...

such+adj.+n.（pl.）/n.（u）÷that...

温馨贴士：当So或SUCh置于句首时，主句要用部分倒装

Soloudlydidhespeakthateveryonecouldhearhim.

ɪ、阚6.【单句填空】

φPopmusicissuchanimportantpartofsociety_—ithaseveninfluenceourlanguage.

A.asB.thatC.whichD.where

②HisplanwassuchagoodoneWeallagreedtoacceptit.

A.soB.andC.thatD.as

考点七：让步状语从句

拓展：引导让步状语从句的从属连词有although,though,as,while（虽然）,evenif∕though（即

使）,whether…Or…（不论/不管...还是....）以及“疑问词+ever"和"nomatter+疑问词”等。

7.【单句填空】

1）Though∕although

manychildrenlikeKFC,Ithinkthey'dbettertrynottoeatittoooften.

A.BecauseB.WhenC.AlthoughD.If

2）evenif7eventhough

Correction:Evenwecouldaffordit,Wewouldn'tgoabroad.

3）nomatter....

Correction:Nomatterhowyousay,Iwon'tchangemymind.

温馨贴士：as引导让步状语从句时，状语表语及谓语动词的一部分置于as之前，且作表语的单数名词前的

冠词要省略。即构成：表语/状语/动词（原）+as+主+谓+其他。

1.形容词+as+主语+系动词。Tiredasheis,heofferstohelpme.

2.过去分词+as+主语+系动词。

Well-writtenasthebookis,theauthorisnotsatisfiedandpreparedtoreviseit.

3.名词+as+主语+系动词。如：Studentasheis,hedoesnotstudyhard.

若表语是单数名词，倒装时要省略冠词。

4.副词+as+主语+谓语部分。如:MuchasIadmirehiscourage,Idon,tthinkheactedwisely.

5.动词原形+as+主语+谓语的一部分（情态动词may,might,will,would等）。

Tryasshemight,shefailed.

[考例1],ɪhaveneverseenanyonewho,sascapableasJohn.

A.AslongasIhavetraveledB.NowthatIhavetraveledsomuch

C.MuchasIhavetraveledD.AsIhavetraveledsomuch

[考例2],Carolinacouldn,tgetthedooropen.

A.TryasshemightB.AsshemighttryC.ShemightastryD.Mightsheastry

考点八：比较状语than...as...as...

Wedon'thavemuchhomeworknowandourschoolbagsaretheyusedtobe.

A.asheavyasB.notasheavyas

C.asheavilyasD.notasheavilyas

考点九：方式状语从句asasiftheway

拓展：省略句(必修3Unit6)

状语从句的省略(重点)

在when,while,whenever,before,afterttill,if,unless,asif,though,than,as等引导时间状语从句，

条件状语从句和让步状语从句中，若谓语部分含有be动词，而从句主语又与主句主语相同或从句主语是it

时，从句的主语和be动词常被省略。

(1)状语从句含有itis或者主从句主语一致且含有be动词时，省略主语和be动词。

(2)从属连词接现在分词强调与句子主语之间的主动关系，用过去分词强调二者之间被动关系。

例1：If(itis)necessary,you,dbetterrefertothedictionary.如果有必要，你最好查字典。

例2：While(Iwas)walkingalongthestreet,Iheardmynamecalled.走在大街上我听到有人叫我名字。

例3：Theactivityismoreinterestingthan(itwas)expected.这个活动比预计的有趣很多。

［注意］特殊的省略结构：if省略结构，常作为插入语来处理。

ifso如果这样的话；ifnot若非如此；ifever如果曾经有的话

ifnecessary如果有必要的话；ifpossible如果可能的话；ifany如果有的话

Ifpossibleletmeknowbeforehand.如有可能，事先通知我。

(4)Getupearlytomorrow,ifnot(youdon'tgetupearly),youwillmissthefirsttrain.

明天早点起床，如果不的话，你将会错过头班车。

(5)Whenever(itis)possible,hewillcometomyhelp.

他会在任何可能的时候来帮助我。

【活学活用】

在空白处填入1个适当的单词。

1.Nochildshallbe,unless(accompany)byanadult,allowedoutoftheschoolduringtheday.

2.Anyone,once(test)positivefornovelcorona-virus,willreceivefreemedicaltreatmentfromour

government.

3.While(do)myhomeworkathome,ɪheardmynamecalled.

【答案与解析】

1.accompaniedo动词accompany与句子主语构成逻辑上被动关系，故用过去分词。故答案是accompanied。

2.testedO动词test与句子主语构成逻辑上被动关系，故用过去分词。故答案是tested。

3.doingo动词do与句子主语构成逻辑上主动关系，故用现在分词。故答案是doing。

真题演练

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l.Itwasnotwidelyacceptedasatravelconceptthelate1980s.

2.Theykeptverymuchtothemselves.Inmyopinion,whereintrouble,WeshouldseekhelpfromthoseWetrust

most.

3.1alsowatertheflowersintheyardandtidyupmyownbedroomwhatevernecessary.

4.1studyItalianIwouldbeabletoreadDanteintheoriginal.

A.sothatB.eventhoughC.incaseD.asif

5.Undertheregulation,restaurantsandhotelsshallstopofferingthrowawayitemscustomersrequestthem.

A.sinceB.onceC.unlessD.until

6.havingaroommateinevitablyhasitschallenges,itcanalsobeagreatpartofyourcollegeexperience.

A.WhileB.WhenC.AsD.If

7.1onlytakeonworkthatexcitesmeitmeansturningdownlotsofmoney.

A.asifB.incaseC.nowthatD.evenif

8.—Whatareyougoingtodothisafternoon?

一I'llprobablygoforawalklateronitstaysfine.

A.asfarasB.solongas

C.evenifD.asif

9.Thoughitis5yearsheretiredfromhisworkplace,theoldprofessorremainsactiveintheacademic

circles.

AwhenB.thatC.beforeD.since

10,thestudentscamefromdifferentcountries,theygotalongquitewellinthesummercamp.

A.WhileB.Unless

C.SinceD.Until

11.richonemaybe.thereisalwayssomethingonewants.

A.WhateverB.WheneverC.HoweverD.Wherever

12.——ɪamgoingtoHainanformyholiday.

----OK.Havefunyoucan.Thehardtimesareapproaching.

A.untilB.beforeC.unlessD.while

13.Maryrushedhomesheheardthenews,onlythatherhusbandwasgone.

A.assoonas;findingB.immediately;tofind

C.themoment;findD.when;found

14.thereisawidevarietyofclothesinherwardrobe,theladystillcomplainsabouthavingnosuitable

clothestowear.

A.EventhoughB.ProvidedthatC.IfonlyD.Asif

ι［昼过关检测

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用括号内所给单词的适当形式填空或单句改错。

1.If(accept)forthejob,you,llbeinformedsoon.

2..Although(beat)bytheoppositeteam,wedidn,tloseheartandencouragedeachother.

3.一Whoshouldberesponsiblefortheaction?

一Thebossistoblame.Theemployeesjustcarriedouttheorderas(tell).

4,When(expose)todangerandconflict,mentendtoincreasebloodpressure,feelingnervousor

anxious.

5,Thecitynowismuchnoisierthanitused(be).

6,1maytakealonglunchbreaktomoπ*ow.If,Icangotothehairdresser,sthen.

7.Theseflowerswilldieunless(water)everyday.

8.Though(warn)ofthedanger,Jackstillwentswimminginthelake.

9.Though(lack)inconfidence,Tommadeeveryeffortandhisdreamcametrueatlast.

10.Hestoppedandlookedaroundasif(see)whetherhewentintherightdirection.

11.itnotforthesupportoftheteachers,thestudentcouldnotovercomeherdifficulty.

12.That,sourviewonhousework.Andhopesthiscaninspiremorethinkingonthetopic!

13.Afterarrivedhome,itoccurredtohimthathecouldmakeabagbyusinghisoldtrousers.

14.Wecan'tcarryontheexperimentunlessbeinggivenenoughfinancialsupport.

15.Shefoundherlostringwhilefoldedclothes.

16.Whilewalkedalongthepaths,youcanhearthesweetsongsofbird.

17.Whencombiningwithalcohol,somemedicinecanhaveextremelydangeroussideeffects.

复盘：

OneSaturdaymorning,whenIwaslisteningtomyfavoritesongs,mymotheraskedmetodomyhomework

first.However,assoonassheleft,IturnedtomyMP3again.Ididn,tstarttodomyhomeworkuntilIheard

somebodyopeningthedoor.HardlyhadItakenoutmyopenwhenmymothercameback.MyMumwasveryangry,

“EverytimeIgoout,youwilldootherthingsinsteadofdoinghomework.IthasbeentwohourssinceIleft.How

muchhomeworkhadyoufinishedbythetimeIenteredtheroom?YoubegantodootherthingsthemomentI

steppedoutoftheroom,didn,tyou7,,Itwashalfanhourbeforeshestoppedscoldingme.IhopeIwillgetridofthe

badhabitsastimegoesby.IpromiseIwillnotdothesamethingwhenshegoesoutnexttime.

思考：

1.状语从句有哪几大类？对应的连词是哪些？

2.分析文章每个句子属于哪一类状语从句？

不同语境中长难句状语从句的使用

1.Notonly...butalso...

1)Notonlydidtheraceenrichourafter-classactivities,butalsoitstrengthenedourwillpower.

翻译：

2)这个专栏不仅拓宽了我的视野，也让我有机会体验不同的文化。

仿写：

2.祈使句+and/or+陈述句

1)Bookticketsandroomsonlineinadvance,andyouwillhavemoretimetogosightseeing.

翻译：

(2)来参观展览吧，你将享受一场视觉盛宴。

仿写：

3.So...that.

(1)Theirpopcornwassodeliciousthatitwassoldoutsoon.

翻译：

(2)惊喜是如此甜蜜，她兴奋地摇了摇正假装打鼾的丈夫。

仿写：

4.Bedoing...when...

(I)Macwaswonderingwhattodonextwhenahandpulledhimintothecar.

翻译：

(2我们正在找地方搭帐篷，这时妈妈告诉我们她忘了带帐篷。

仿写：

5.Notuntil...

(1)Notuntilafterwhatseemedhalfacenturydidweheartheroarofthehelicopter.

翻译：

(2)直到昨天我才得知我们班这个周末要开一个重要的会议一一正好是我们见面的时间。

仿写：

第04讲状语从句

3.掌握常见状语从句的连词意思。

4.特殊连词和时态的关系以及省略句(必修3Unit6)。

基础知识

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状语是什么？

基本概念：

(1)概念：状语从句在复合句中作状语，修饰主句中的动词、形容词、副词等。

(2)句型特点：

状语从句可以放在主句之前，也可以放在主句之后。放在主句之前时，常用逗号与主句分开；放在主

句之后时，不用逗号。

2.分类及引导词

状语从句引导词

时间状语从句when,while,as,before,after,untiɪ(till),assoonas,since

条件状语从句if,unless

原因状语从句because,as,since

方式状语从句Asif,theway

结果状语从句so...that...,such...that...

目的状语从句sothat,inorderthat

让步状语从句though,although,evenif,eventhough,nomatter...

比较状语从句than,as...as...

ι∣C考点剖析

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考点一：时间状语从句

1)When/while/as

活学活用：Louiscomputergameswhenherbrotherphonedher.

A.playsB.isplaying

C.hasplayedD.wasplaying

Iwasabouttogoouttheteachercamein.

yearsgoby,Chinaisgettingstrongerandricher.

Thesonwashavingagoodmealathome,theparentswereworkinginthefields.

Ihadhardlyclosedmyeyessomeoneknockedatthedoor.

温馨小贴士：When常考结构：

beabouttodo...when/beonthepointofdoing...when

bedoing...when

...hadjustdone...when.../...hadhardly/scarcely...when

2)after/before/since

Jane,pleaseturnoffthelightsyouleavetheclassroom.

A.afterB.beforeC.untilD.since

3)until/till

—Hurryup!Thebusiscoming.

—Waitaminute.Don,tcrossthestreetthetrafficlightsaregreen.

A.untilB.after

C.whileD.since

4)assoonas,theminute.....

Tomwillcallmeassoonashehome.

A・getsB.hasgot

C.gotD.willget

4)表示“一...就...''的从属连词：assoonas;theminute,thesecond,theinstant;immediately,directly,

instantly;nosooner...than...,hardly...when....

-DidyouremembertogiveMarythemoneyyouowedher?

-Yes,1gaveittoherIsawher.

A.whileB.themomentC.suddenlyD.once

5).可引导时间状语从句的time短语：everytime,eachtime,(the)nexttime9(the)lasttime,thefirsttime,

anytime等.

IthoughtherniceandhonestImether.

A.firsttimeB.forthefirsttimeC.thefirsttimeD.bythefirsttime

6),Itbe...since/before/when...句型：

①“Itis/hasbeen+时间段+since…”从句谓语为终止性动词表示“自从……以来有多久了''；但若从句谓词是

延缓性动词时，则意为“(多久)不做……了”；

Itistwomonthssincewecamehere.

Ithasbeenfiveyearssincehesmoked.

②“北川114》5¥滥+时间段+改丘也..“肯定句：表示“过……之后才……,,;否定句：表示“没过……就

③“Itbe+时间点+when…”表示“当...时，时间是....”。注意比较和强调句的不同。

练习：

©ItisalmostfiveyearsWesaweachotherlasttime.

A.beforeB.sinceC.afterD.when

②Thatwasreallyasplendidevening.It,syearsIenjoyedmyselfsomuch.

A.whenB.thatC.beforeD.since

1.【单句填空】

(用before,when,since,that填空)

1.Itwastwoyearsherealizedthetruth.

2.Itwillbetwoyearstheeconomicsituationimproves.

3.Itwastwoyearslaterherealizedthetruth.

4.Itis/hasbeentwoyearshelivedhere.

5.Itwasmidnighthearrivedhome.

6.Itwasatmidnighthearrivedhome.

7.Itwasnotuntilmidnighthearrivedhome.

考点二：条件状语从句

从属连词有：if,unless(=if...not),as/solongas,supposing(that)(⅞□M),provided∕providing(that)(如果),in

case(假使)，onconditionIhat(在...的条件下)等。

2.【单句填空】

Ifyoureallyholdontoyourdreams,theytrueoneday.

A.cameB.comes

C.hascomeD.willcome

Iknowthemoneyissafe,Ishallnotworryaboutit.

A.EventhoughB.UnlessC.AslongasD.While

考点三：原因状语从句

原因状语because/since/asnowthatinthat

—Iseveryoneheretoday?

一No.Tomisathomehehasgotabadcold.

A.becauseB.ifC.untilD.unless

引导原因状语从句的从属连词有because,as,since,now(that),when(既然)，as,seeing(that)(由于),considering

(that),given(that)(考虑到)等。

温馨提示:for引导的原因状语从句不放在句首。

3.【单句填空】

©Parentsshouldtakeseriouslytheirchildren,srequestsforsunglasseseyeprotectionisnecessaryinsunny

weather.

A.becauseB.thoughC.unlessD.if

②everybodyknowsaboutit,1don,twanttotalkanymore.

B.ForB.EvenC.SinceD.However

考点四：地点状语从句

引导词：where（在。。。的地方）或WhereVer（在。。。的任何地方）

4.【针对练习】

Thefamousscientistgrewuphewasbornandin1930hecametoShanghai.

A,whenB,wheneverC,whereD.wherever

区别：Where引导的定语从句和状语从句

You,dbettermakeamarkwhereyouhaveanyquestions.从句

You'dbettermakeamarkattheplacewhereyouhaveanyquestions.从句

考点五：目的状语从句

sothat...inorderthat...

5.【单句填空】

TheteacherspeaksVeryloudlyallthestudentscanhearher.

A.sothatB.because

C.sinceD.when

考点六：结果状语从句so...that....Such...that...

Patternshift:Thatlessonissodifficultthatnobodycanunderstandit.

结果状语从句常由SO…that或SUCh...that引导，掌握这两个句型，首先要了解So和SUeh与其后的词的搭

配规律。

so+adj./adv.+that...

so+adj.+a/an+n.(单)+that...

so÷many/much/few∕little(少)+that...

{such+a∕an+adj.÷n(单)+that...

such+adj.+n.(pl.)/n.(u)+that...

温馨贴士：当So或SUCh置于句首时，主句要用部分倒装

Soloudlydidhespeakthateveryonecouldhearhim.

@Popmusicissuchanimportantpartofsociety_____ithaseveninfluenceourlanguage.

A.asB.thatC.whichD.where

②Hisplanwassuchagoodoneweallagreedtoacceptit.

A.so氏andC.thatD.as

考点七：让步状语从句

拓展：引导让步状语从句的从属连词有although,though,as,while（虽然）,evenif∕though（即

使）,whether...or...（不论/不管...还是....）以及“疑问词+ever”和“nomatter+疑问词”等。

7.【单句填空】

1)Though∕although

manychildrenlikeKFC,ɪthinkthey,dbettertrynottoeatittoooften.

A.BecauseB.WhenC.AlthoughD.If

2)evenif/eventhough

Correction:Evenwecouldaffordit,wewouldn'tgoabroad.

3)nomatter....

Correction:Nomatterhowyousay,Iwon,tchangemymind.

温馨贴士：as引导让步状语从句时，状语表语及谓语动词的一部分置于as之前，且作表语的单数名词前的

冠词要省略。即构成：表语/状语/动词（原）÷as÷主+谓+其他。

1.形容词+as+主语+系动词。Tiredasheis,heofferstohelpme.

2.过去分词+as+主语+系动词。

Well-writtenasthebookis,theauthorisnotsatisfiedandpreparedtoreviseit.

3.名词+as÷主语+系动词。如：Studentasheis,hedoesnotstudyhard.

若表语是单数名词，倒装时要省略冠词。

4.副词+as+主语+谓语部分。如：MuchasIadmirehiscourage,Idon,tthinkheactedwisely.

5.动词原形+as+主语+谓语的一部分（情态动词may,might,will,would等）。

Tryasshemight,shefailed.

[考例1],Ihaveneverseenanyonewho,sascapableasJohn.

A.AslongasIhavetraveledB.NowthatIhavetraveledsomuch

C.MuchasIhavetraveledD.AsIhavetraveledsomuch

【考例2],Carolinacouldn,tgetthedooropen.

A.TryasshemightB.AsshemighttryC.ShemightastryD.Mightsheastry

考点八：比较状语than…as...as...

Wedon,thavemuchhomeworknowandourschoolbagsaretheyusedtobe.

A.asheavyasB.notasheavyas

C.asheavilyasD.notasheavilyas

考点九：方式状语从句asasiftheway

拓展：省略句（必修3Unit6）

状语从句的省略（重点）

在when,while,whenever,before,after,till,if,unless,asif,though,than,as等弓I导时间状语从句，

条件状语从句和让步状语从句中，若谓语部分含有be动词，而从句主语又与主句主语相同或从句主语是it

时∙，从句的主语和be动词常被省略。

（3）状语从句含有itis或者主从句主语一致且含有be动词时，省略主语和be动词。

（4）从属连词接现在分词强调与句子主语之间的主动关系，用过去分词强调二者之间被动关系。

例1：If（itis）necessary,you,dbetterrefertothedictionary.如果有必要，你最好查字典。

例2：While(Iwas)walkingalongthestreet,Iheardmynamecalled.走在大街上我听到有人叫我名字。

例3：Theactivityismoreinterestingthan(itwas)expected.这个活动比预计的有趣很多。

［注意］特殊的省略结构：if省略结构，常作为插入语来处理。

ifso如果这样的话；ifnot若非如此；ifever如果曾经有的话

ifnecessary如果有必要的话；ifpossible如果可能的话；ifany如果有的话

Ifpossible»letmeknowbeforehand.如有可能，事先通知我。

(4)Getupearlytomoιτow,ifnot(youdon'tgetupearly),youwillmissthefirsttrain.

明天早点起床，如果不的话，你将会错过头班车。

(5)Whenever(itis)possible,hewillcometomyhelp.

他会在任何可能的时候来帮助我。

【活学活用】

在空白处填入1个适当的单词。

1.Nochildshallbe,unless(accompany)byanadult,allowedoutoftheschoolduringtheday.

2.Anyone,once(test)positivefornovelcorona-virus,willreceivefreemedicaltreatmentfromour

government.

3.While(do)myhomeworkathome,ɪheardmynamecalled.

【答案与解析】

1.accompaniedo动词accompany与句子主语构成逻辑上被动关系，故用过去分词。故答案是accompanied。

2.testedo动词test与句子主语构成逻辑上被动关系，故用过去分词。故答案是IeSled。

3.doingo动词do与句子主语构成逻辑上主动关系，故用现在分词。故答案是doing。

1域真题演练

----------------IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII-----------------

l.Itwasnotwidelyacceptedasatravelconceptthelate1980s.

【答案】until

【解析】

考查状语从句连词。根据空前有not可知，此处until与not一起构成固定用法not...until,意为"直到

才……"»句意：直到20世纪80年代后期，它才作为一种旅游概念被广泛接受。故填Unti1。

2.Theykeptverymuchtothemselves.Inmyopinion,whereintrouble,weshouldseekhelpfromthosewetrust

most.

［答案】where→when∕whenever

【解析】

考查状语从句连词。句意：在我看来，当我们有麻烦时(无论什么时候我们有麻烦时)，我们应该从我们

最相信的人们那里寻求帮助。分析可知，本句为含有状语从句的复合句。主句为WeShOUldSeekhelP…，从

句表示的含义为无论什么时候我们有麻烦或者当我们有麻烦时，所以应用When/whenever引导。故where改

为WhenZwhenevero

3.1alsowatertheflowersintheyardandtidyupmyownbedroomwhatevernecessary.

【答案】whatever→whenever

【解析】

考查状语从句连词。句意：我也给院子里的花浇水，必要时打扫我自己的卧室。根据句意可知，此处表达“有

必要时我也会打扫自