2021高考英语一轮复习考点十四短文改错练习（含解析）

考点十四短文改错

名词3年10考连词3年13考

考点冠词3年7考形容词/副词3年21考

考频代词3年6考动词3年13考

介词3年7考非谓语动词3年9考

预测从语法考点来看，预计2020年高考以考查动词、名词、形容词和副词

说明为主，其中代词和连词的考查频率也比较高

三年全国卷

解题初读全文，了解大意一逐句研读，认真改错一审查句子结构，仔细推

考情分析

流程敲一改后复读，纠正失误，减少差错

四不改：①单词拼写错误不改；②大小写不改；③词序错误不改（应从

错词或少词方面考虑）；④标点符号不改

做题

五原则：①忠实原文原则（不改变原文的原意）；②错误以改动最少为

原则

原则；③虚词以添加或删除为原则；④实词以改变形式为原则；⑤以

多改、少添加或删除为原则

第1.步刷基础•刷经典

Passage1

限时7分钟

Doyoubelieveloveisthemostimportant?Intheearlytwentycentury,homeless

peoplewereoftenbroughtupinorphanages,inthattheyreceivedlittlelove.At

onetime,DrSkeelstooktwelvechildrenfromanorphanageorhadayounggirllook

themeachday.Healsostudiedanothertwelvechildrenwhoareleftintheorphanage

alldaylong.Hefollowedthesechildrennotuntiltheygrewup,andtheresultswere

shocked.Thechildrenstayingalldayintheorphanagewereeitherdeadorsuffering

fromseriousillnesses.However,thetwelvechildrenlovedbythegirlwereallhealthy

andindependently.Theonlydifferencebetweenthelifeofthesechildren一thelove,

madeagreatdifferencetous.

答案：

Doyoubelieveloveisthemostimportant?Intheearlytwentycentury,

©twentieth

homelesspeoplewereoftenbroughtupinorphanages,inthattheyreceivedlittle

②which

love.Atonetime,DrSkeelstooktwelvechildrenfromanorphanageorhadayoung

③and

girllookAthemeachday.Healsostudiedanothertwelvechildrenwhoare

©after©were

leftintheorphanagealldaylong.Hefollowedthesechildren®untiltheygrew

up,andtheresultswereshocked.Thechildrenstayingalldayintheorphanage

©shocking

wereeitherdeadorsufferingfromseriousillnesses.However,thetwelvechildren

lovedbythegirlwereallhealthyandindependently.Theonlydifferencebetween

©independent

thelifeofthesechildren—thelove,madeagreatdifferencetous.

⑨lives⑩them

1.twenty-*twentieth考查数词。表示二十世纪，不用基数词要用序数词，故将twenty

改为twentietho

2.thatfwhich考查定语从句的引导词。句中包含定语从句，修饰先行词orphanages,

关系词在定语从句中作状语，表地点，故定语从句用“介词+which”引导，相当于where,

故将that改为whicho

3.or-*and考查连词。此处指DrSkeels从孤儿院领出了12个孩子，并且让一个年轻

女孩照顾他们。前后句是并列关系，不是转折，故将。r改为and。

4.look后加after考查动词短语。此处表示照顾，是lookafter,故look后加aftero

5.are-were考查动词的时态。此处指被留在孤儿院的另外12个孩子，故事发生在过

去，所以用一般过去时的被动语态，故将are改为were。

6.删除not考查连词。until"直到……时”，notuntil"直到……才”，此处指

他密切关注这些孩子直到他们长大，根据句意删除note

7.shocked-shocking考查形容词。此处表示结果是令人震惊的，用shocking。

8.independently->independent考查形容词。此处作系动词were的表语，和and前

的形容词healthy并列，也用形容词，故将independently改为independento

9.life-lives考查名词。此处指这些被调查的孩子的生活，用复数形式。故将life

改为liveso

10.us->them考查代词。此处指代thesechildren,用they的宾格，故将us改为them。

Passage2

限时7分钟

YesterdaymorningIwasonmywaytowork.SuddenlyIstoppedbyawomanonthe

sidewalk.SheaskedmeifIknewhowtogettoCASS,thatisalocalshelterforthe

homeless.Icouldtellshewasextremeupset,soItoldherI'dlookitupforher

onmysmartphones.Whilewaiting,shetoldmeshewaslosinganddidn'thavemoney

forthebus.Itookoutofa20-dollarbillfrommypursebuthandedittoher.Then

Iaccompanyhertothenearestbusstop.Seethehappysmileonherfacebrightened

upmyday,either.

答案：

YesterdaymorningIwasonmywaytowork.SuddenlyIAstoppedbyawoman

①was

onthesidewalk.SheaskedmeifIknewhowtogettoCASS,thatisalocalshelter

②which

forthehomeless.Icouldtellshewasextremeupset,soItoldherI'dlookit

©extremely

upforheronmysmartphones.Whilewaiting,shetoldmeshewaslosinganddidn，t

©smartphone⑤lost

havemoneyforthebus.Itookoutefa20-dollarbillfrommypursebuthanded

(6)⑦and

ittoher.ThenIaccompanyhertothenearestbusstop.Seethehappysmile

©accompanied©Seeing

onherfacebrightenedupmyday,either.

⑩too

1.I后加was考查谓语动词以及动词的语态。根据ustoppedbyawomanw可知，此

处是被动语态，句中缺少be动词，主语是I,时间为一般过去式，故在I后面加was。

2.that-which考查定语从句。that不能引导非限制性定语从句，先行词是CASS,指

物，故将that改为whicho

3.extreme-*extremely考查副词。副词可以用来修饰形容词，故将extreme改为

extremely<>

4.smartphones-*smartphone考查名词。此处指“我”的手机，用单数形式。故将

smartphones改为smartphone。

5.losing->lost考查形容词。形容词lost表示“迷路的"。故将losing改为lost。

6.去掉of考查介词。此处表示“拿出”用“takeout”，of多余，故去掉。

7.but-and考查连词。此处前后表示顺承关系，而非转折，故将but改为and。

8.accompanyfaccompanied考查动词的时态。本文的时态为一般过去时，故将

accompany改为accompanied。

9.See-Seeing考查非谓语动词。此处是动名词作主语，故将See改为Seeing。

10.either-*too考查副词。表示肯定的“也”用too而非“either”。故将either

改为tOOo

Passage3

限时6分钟

ThemomentIsteppedinhighschool,Ihavemadeupmymindtostudyhardfor

thepurposeofenteringthegooduniversity.Inthefirstyear,Imadealotofnew

friends,allofwhoweresoexcellent.Ifeltgreatpressureduringthesecondyear.

MyscoreswentupordownandIfeltsoworrying.ItoldmethatIneededrelaxation.

Listentomusicwasagoodway.Besides,Iwouldliketalkwithmyfriends,because

theyunderstoodme.Wewouldhavesometeaintheshopandthensharesecret.When

welaughedouthappy,alltheannoyancewoulddisappear.

答案：

ThemomentIsteppedinhighschool,Ihavemadeupmymindtostudyhardfor

①

thepurposeofenteringthegooduniversity.Inthefirstyear,Imadealotofnew

②a

friends,allofwhoweresoexcellent.Ifeltgreatpressureduringthesecond

③whom

year.MyscoreswentupordownandIfeltsoworrying.ItoldmethatI

④and©worried⑥myself

neededrelaxation.Listentomusicwasagoodway.Besides,IwouldlikeA

⑦Listening⑧to

talkwithmyfriends,becausetheyunderstoodme.Wewouldhavesometeaintheshop

andthensharesecret.Whenwelaughedouthappy,alltheannoyancewould

©secrets⑩happily

disappear.

1.去掉have考查动词的时态。根据前面“ThemomentIsteppedin”可知应该用一

般过去时。

2.the-a'考查冠词。此处表示“一所好的学校”，是泛指。

3.whofwhom'考查定语从句的引导词。前面有of,故用who的宾格形式whom。

4.orfand'考查连词。upanddown"上上下下”，固定用法。

5.worryingfworried'考查形容词。表示人“担心的"用worried。

6.me-myself'考查反身代词。此处表示“我告诉我自己”用反身代词myself。

7.Listen-*Listening'考查非谓语动词。动名词作主语用Listeningo

8.talk前加to考查固定用法。wouldliketodo意为"想做某事”。

9.secret-secrets'考查名词。secret是可数名词，此处指“分享秘密”用复数形式。

10.happy—happily'考查副词。修饰动词laugh要用副词happilyo

Passage4

限时8分钟

RecentlywehadaclassmeetingonthetopicofMyChineseDream.Somementioned

theinspiredChineseDreamthatwasputforwardbyPresidentXi.Andotherstalked

enthusiasticallyabouthisunderstandingoftheChineseDream.Weareal1believe

thatthisdreamwillcometrueinthefuture.Ialsotalkedaboutmyowndream.I

hadalwayswantedtobeadoctor.Notonlycandoctorssavepeople"slifebutthey

alsoaredoingarespectablyjob.Doctorscanalsohelppeopletoliveabetterlife

withouttheirprofessionalknowledge.Torealizemydream,Ishouldtrytoworkhardly

fromnowon.ImustlearnasmuchasIcangetintoagoodmedicalcollege,which

Icanpreparemyselffullyforthejobofadoctor.

答案：

RecentlywehadaclassmeetingonthetopicofMyChineseDream.Somementioned

theinspiredChineseDreamthatwasputforwardbyPresidentXi.Andotherstalked

©inspiring

enthusiasticallyabouthisunderstandingoftheChineseDream.Wearcall

②their③

believethatthisdreamwillcometrueinthefuture.Ialsotalkedaboutmyowndream.

1hadalwayswantedtobeadoctor.Notonlycandoctorssavepeopletslife

©have⑤lives

buttheyalsoaredoingarespectablyjob.Doctorscanalsohelppeopletolive

©respectable

abetterlifewithouttheirprofessionalknowledge.Torealizemydream,Ishould

⑦with

trytoworkhardlyfromnowon.ImustlearnasmuchasIcanAgetintoagood

⑧hard(9)to

medicalcollege,whichIcanpreparemyselffullyforthejobofadoctor.

⑩where

1.inspired-*inspiring考查形容词。inspired为由过去分词转化来的形容词，

inspiring为由现在分词转化来的形容词，本句中，inspire和ChineseDream之间存在主动

关系，应用现在分词转化来的形容词作定语，故把inspired改为inspiring。

2.his-their考查代词。分析句子可知，是其他人热情地谈论了他们(their)对中国

梦的理解，而不是他的(his)。故把his改为their。

3.去掉are考查动词。本句中的主语是we,谓语动词是believe,所以are是多余的。

而且从语法的角度来说，are后不能直接跟动词原形。故去掉are。

4.had-have考查动词的时态。本句意是说“我一直想成为一名医生”，应该用现在

完成时，而不是过去完成时，故把had改为have。

5.life-lives考查名词。分析句子可知，本句说作为医生是能挽救许多人的性命。

表示“生命”life为可数名词。故把life改为liveso

6.respectably-*respectable考查形容词。分析句子可知，此处需要修饰名词，所以

不能用副词，而要用形容词，意为“令人尊敬的”，故把respectably改为respectable。

7.without->with考查介词。根据句意可知，本句指的是医生也可以用专业知识帮助

人们过上更好的生活。而without意为“没有，无”，因此改为with。

8.hardly-hard考查副词。workhard意为“努力工作”，其中hard意为“努力地”。

而hardly意为“几乎不，简直不"。故把hardly改为hard。

9.can后加to考查动词不定式作目的状语。分析句子可知，“我”必须尽“我”所能，

以便上一所好的医学院。因此can后缺少动词不定式符号to。故在can后加to。

10.which-*where考查非限制性定语从句的引导词。分析句子可知，本句中“agood

medicalcollege"为先行词，引导词在定语从句中作状语，且表示地点。故把which改为

whereo

Passage5

限时7分钟

Theenvironmentpollutionismoreandmoreseriouslytoday.Wehavenocleanwater

todrinkitbecauseofwaterpollution.Andwhentreescutdown,someanimalsdisappear.

Therewasmoreandmoredirtysmokeintheair.People*shealthhasbeengreatly

affectingbyair,noiseandwaterpollution.Manypeoplehavediedofdiseasecaused

bypollution.Inordertolivethebetterlife,it'stimeforustoprotectourworld.

Firstly,weshouldn，tthrowawayrubbisheverywhere.Andweshouldrecycle,

reduceandreusethings,whatsavesmoneyandreducespollution.Usethingssolong

aspossible.Don'tuseplasticbags.Besides,wemustplantmoretreesandstoppeople

cutthemdown.Wehopeourworldwillbemoreandmorebeautiful.

答案：

Theenvironmentpollutionismoreandmoreseriouslytoday.Wehavenoclean

①serious

watertodrinkitbecauseofwaterpollution.AndwhentreesAcutdown,some

②③are

animalsdisappear.Therewasmoreandmoredirtysmokeintheair.People'shealth

@is

hasbeengreatlyaffectingbyair,noiseandwaterpollution.Manypeoplehavedied

©affected

ofdiseasecausedbypollution.Inordertolivethebetterlife,it'stimefor

©diseases⑦a

ustoprotectourworld.

Firstly,weshouldn，tthrowawayrubbisheverywhere.Andweshouldrecycle,

reduceandreusethings,whalsavesmoneyandreducespollution.Usethingsso

⑧which⑨as

longaspossible.Don，tuseplasticbags.Besides,wemustplantmoretreesandstop

peoplecutthemdown.Wehopeourworldwillbemoreandmorebeautiful.

⑩cutting

1.seriously-*serious考查形容词。作表语应用形容词。

2.去掉it考查动词不定式作后置定语。ahavenocleanwatertodrink”中drink

的宾语是“nocleanwater”，故it多余，需去掉。

3.trees后加are考查动词的语态。主语和谓语动词之间是被动关系，故用被动语态。

4.was-is考查动词的时态。上下文时态应保持一致，故用一般现在时。

5.affecting-*affected考查动词的语态。此处指人类健康受到影响，故应用被动语

态。

6.disease—diseases考查名词。此处表示“多种疾病”，故用名词复数形式。

7.the-a考查冠词。这里表示泛指，意为“过更好的生活”，且bett6r的发音以辅

音音素开头，故将the改为a。

8.what-which考查定语从句的引导词。what不能用来引导定语从句，只能用来引导

名词性从句，在定语从句中，指代前面的内容，表示“这一点，这件事”，并且是非限制性

定语从句，应用which来引导。

9.so-*as考查固定结构。as+形容词/副词原级+as,在否定句中可把第一个as换成

so,但是其他情况下不能把as换成soo

10.cut-*cutting考查非谓语动词。stopsb.(from)doingsth.“阻止某人做某事“。

Passage6

限时7分钟

Danielwasbornwithabraindisorder.Becauseofit,hewasdifferentlyfrom

otherchildren.Asaboy,helikestoplayaloneandactedstrangely.Tomanyofhis

classmate,Danielseemedunusualandwelaughedathim.ThishurtDanieldeeply,but

hebecameveryshy.Asateenager,thingswerechanged.Danielfoundhecouldsolve

difficultmathsproblemsalmostinstantly.Healsodiscoveredothertalent:hecould

learntospeakalanguageveryquickly.Today,heisfluentintwelfthlanguages.

Asadult,Danielhasovercomehisshyness.Uehaswrittentwobooksandnowhetravels

constantlytotalktopeoplewithhislife.

答案：

Danielwasbornwithabraindisorder.Becauseofit,hewasdifferentlyfrom

©different

otherchildren.Asaboy,he]ikestoplayaloneandactedstrangely.Tomanyof

②liked

hisclassmate,Danielseemedunusualandwelaughedathim.ThishurtDaniel

③classmates④they

deeply,buthebecameveryshy.Asateenager,things--changed.Daniel

⑤so/and(6)

foundhecouldsolvedifficultmathsproblemsalmostinstantly.Healsodiscovered

othertalent:hecouldlearntospeakalanguageveryquickly.Today,heisfluent

©another

intwelfthlanguages.AsAadult,Danielhasovercomehisshyness.Hehaswritten

⑧twelve⑨an

twobooksandnowhetravelsconstantlytotalktopeoplewithhislife.

⑩about

1.differentlyfdifferent考查形容词。结合前面的系动词was可知，此处是be

differentfrom"与...不同"，故改为形容词different作表语。

2.likes-liked考查动词的时态。综合全文，讲述过去的事情即介绍Daniel还是小

男孩时的情况，因此此处应该为一般过去时，故将likes改为liked。

3.classmate-*classmates考查名词。结合前面的many可知，后面的名词应该是复数

形式，故将classmate改为classmateso

4.we-they考查代词。结合语境，此处表示他的很多同学嘲笑他，故将we改为they。

5.but-so/and考查连词。根据语境，此处表示由于这深深伤害了他，因此他变得很

害羞，同学们嘲笑Daniel让Daniel很受伤和Daniel变得很害羞这两件事并不是转折关系，

而是因果或并列关系，因此把but改成so/ando

6.删除were考查动词的语态。根据语境，此处表示事情发生了变化，是一种主动的

行为，故将were删除。

7.other-another考查限定词。other后加可数名词复数形式，而且talent后有一

个冒号，在解释说明talent的内容，他能够很快地学会一门新语言。这是一种技能，是除了

“他能很快解决数学难题”外的“另一”技能，故把。ther改成another。

8.twelfth-twelve考查数词。结合语境，此处表示他已经能够很流利地说12种语言

了，此处表示数量，而不是第十二种语言，因此将twelfth改为twelve。

9.adult前加an考查冠词。结合语境，adult是可数名词，而且根据前文“asaboy”，

“asateenager可知，这里是asanadulto此处表示作为一个成年人，他克服了他的害

羞，因此在adult前加an。

10.withfabout考查介词。此处是talktosb.aboutsth.“和某人谈论某事”，

因此将with改为abouto

Passage7

限时7分钟

Peopleusedtocommunicatewitheachotherthroughlettersandpublicphones.

SonowadaystheyusemobilephonesandtheInternetinsteadof.Thischangein

communicationhavegoodeffectsonourworksandlife.Comparingwithlettersand

publicphones,mobilephonesandtheInternetarefastandmuchmoreconvenient.If

youmissedyourgrandmother,youjusttakeoutyourphoneandsay“hello“tohim.

Andshewillbehappytohearyourvoice.Ifyouwanttoplaceorderwithaforeign

company,youcane-mailthemessage.It'llbeminutesafteryougettheirreply.

答案：

Peopleusedtocommunicatewitheachotherthroughlettersandpublicphones.

SonowadaystheyusemobilephonesandtheInternetinsteadof.Thischange

©But②

incommunicationhavegoodeffectsonourworksandlife.Comparingwith

③has©work⑤Compared

lettersandpublicphones,mobilephonesandtheInternetarefastandmuchmore

⑥faster

convenient.Ifyoumissedyourgrandmother,youjusttakeoutyourphoneandsay

⑦miss

“hello”tohim.Andshewillbehappytohearyourvoice.Ifyouwanttoplace

⑧her

Aorderwithaforeigncompany,youcane-mailthemessage.It'llbeminutes

⑨an

afteryougettheirreply.

⑩before

1.So-But考查连词。前后两个单句之间是转折关系而非因果关系，用连词but,因

此将So改为But。

2.去掉of考查介词。instead意为“替代，顶替”，是副词，insteadof意为"（用.）

代替……”，是介词短语，此处应是用副词“替代，顶替”，因此去掉of。

3.have-has考查主谓一致。主语change是单数形式，谓语动词也应用单数形式has,

故将have改为haso

4.works-work考查名词。此处work“工作”为不可数名词，没有复数形式，因此

将works改为worko

5.ComparingfCompared考查非谓语动词。mobilephonesandtheInternet与compare

之间是被动关系，用过去分词短语Comparedwithlettersandpublicphones作状语，因

此将Comparing改为Comparedo

6.fast-faster考查形容词比较级。and是并列连词，它前后连接两个相同的语法成

分，faster和muchmoreconvenient都是形容词比较级作并列表语，因此将fast改为faster。

7.missed-miss考查动词的时态。本文讲述的是一般事实，用一般现在时态，故将

missed改为miss。

8.him—her考查代词。her指代grandmother,故将him改为her。

9.place后加an考查冠词。order是可数名词，单数形式前加不定冠词表示泛指，因

其读音以发元音开头，用不定冠词an,因此在place后加an。

10.after->before考查连词。It+be+一段时间+before-clause表示“过一段时间

才...”，因此将after改为before。

Passage8

限时6分钟

Tenyearsago,myhometownisasmallandpoorcitywithfewfactories.Andthe

citizenshadfewchoiceontransportation.However,nowadaysmyhometownhastaken

onbrandnewlookwithrapiddevelopmentofcultureandeconomy.Thecitizens'living

conditionshavebeengreatlyimproveandtheir1ifestylesaredifferentfrominthe

past.Shoponlinehasbecomepopular.Whentheycomestotransportation,privatecars

havebecomeacommonwayoftravelingbesidepublictransportation.Thebestchange

iswhichallthepeoplearelivingahopefullifewithconfident.

答案：

Tenyearsago,myhometowni_sasmallandpoorcitywithfewfactories.

①was

Andthecitizenshadfewchoiceontransportation.However,nowadaysmyhometown

©choices

hastakenonAbrandnewlookwithrapiddevelopmentofcultureandeconomy.The

③a

citizens'livingconditionshavebeengreatlyimproveandtheirlifestylesare

©improved

differentfrom—in--thepast.Shoponlinehasbecomepopular.Whenthey

⑤⑥Shopping⑦it

comestotransportation,privatecarshavebecomeacommonwayoftravelingbeside

©besides

publictransportation.Thebestchangeiswhichallthepeoplearelivingahopeful

⑨that

lifewithconfident.

©confidence

1.is-was考查动词的时态。根据时间状语Tenyearsago,可知谓语动词用一般过

去时，因此将is改为waso

2.choice-*choices考查名词。few修饰可数名词复数，因此将choice改为choices。

3.on后加a考查冠词。anewlook泛指“呈现一片新面貌”,因此在on后加a。

4.improve-*improved考查动词的时态和语态。句意：人民的生活条件有了很大的改

善，生活方式与过去不同。谓语动词是现在完成时的被动语态，因此将improve改为improved。

5.去掉in考查介词。differentfrom"与...不同"，故去掉in。

6.ShopfShopping考查非谓语动词。此处动名词作主语，因此将Shop改为Shopping。

7.they-*it考查代词。whenitcomesto...固定句式，”谈到...时”，因此将

they改为ito

8.beside—besides考查介词。besides介词，”除了...之外,还...."；beside

“在……旁边”，本句想说明的是除了大众交通方式以外的私家车出行也变得普遍，因此将

beside改为besides。

9.which-that考查表语从句。这是一个表语从句，引导词在从句中不作成分，用that,

因此将which改为thato

10.confident-*-confidence考查名词。介词后接名词作宾语，因此将confident改为

confidence。

Passage9

限时7分钟

Whenitcametocityandcountrylife,Ithinktheyallhavetheirownadvantages

anddisadvantages.Forcitylife,youknow,thetrafficistooconvenientthatyou

canarrangeyourlifeflexibleandeasily.Atsametime,therearemanygreat

opportunityforyouwhenlookingforjobs.Also,thereisnodoubtthatthequality

oflifeisfantastic.Unfortunately,livedincities,youwillsuffermuchstress

andheavyairpollution.

Forcountry1ife,asweallknowit,thelifeispeacefulandtheenvironment

isbeautiful,whichisbothgoodforyourhealth.Therefore,itisinconvenientfor

peopletogoout.Besides,thecommunicationisn'teasy.

答案：

Whenitcametocityandcountrylife,Ithinktheyallhavetheirown

①comes②both

advantagesanddisadvantages.Forcitylife,youknow,thetrafficistoo

③so

convenientthatyoucanarrangeyourlifeflexibleandeasily.AtAsametime,

©flexibly⑤the

therearemanygreatopportunityforyouwhenlookingforjobs.Also,thereis

©opportunities

nodoubtthatthequalityoflifeisfantastic.Unfortunately,livedincities,

©living

youwillsuffermuchstressandheavyairpollution.

Forcountrylife,asweallknow-44^,thelifeispeacefulandtheenvironment

isbeautiful,which适bothgoodforyourhealth.Therefore,itisinconvenient

⑨are⑩However

forpeopletogoout.Besides,thecommunicationisn'teasy.

1.came->comes考查动词的时态。全文用一般现在时，描述作者的观点，故此处也应

用一般现在时。

2.all->both考查代词。they指代的是上文cityandcountrylife两种情况，应用

botho

3.too-*so考查固定句型。so...that...”如此....以至于....”。

4.flexible-*flexibly考查副词。修饰动词arrange应用副词。

5.At后加the考查固定搭配。atthesametime"与此同时”。

6.opportunity->opportunities考查名词。前有many修饰，故用复数形式

opportunitieso

7.lived—living考查非谓语动词。主语you与live之间为逻辑上的主谓关系，故用

现在分词形式作状语。

8.去掉it考查as引导的定语从句。因