78个高中重要英语知识点.docx
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78个高中重要英语知识点.docx
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78个高中重要英语知识点
1.it强调句强调句的基本构成:
itis/was+被强调部分+who/that+剩余部分
原句的谓语动词如果是现在或将来时态用itis….that/who….
如原句的谓语动词是过去时态,则用itwas….that/who….
强调时间,地点,原因或方式时不要用when,where,how,必须用that.
(1)isawhiminthestreetyesterdayafternoon.
—itwasiwhosawhiminthestreetyesterdayafternoon.
(2)whendidyouseehiminthestreet?
—whenwasitthatyousawhiminthestreet?
(3)whodidyouseeinthestreetyesterday?
—whowasitthatyousawinthestreetyesterday?
(4)hedidn’tgotobeduntilhismothercameback.
—itwasnotuntilhismothercamebackthathewenttobed.
(5)idon’tknowwhenhewillcomeback.
—idon’tknowwhenitisthathewillcomeback.
(6)itisonlywhenyounearlylosesomeonethatyoufullyrealizehowmuchyouvaluehim.
—onlywhenyounearlylosesomeone,youfullyrealizehowmuchyouvaluehim.
(7)itwasn’tuntilhisfathercamebackfromworkthathegotdowntodoinghishomework.
(8)itwasbecausethetrafficwasveryheavyduringtherushhour,iwaslateagain.
2.….before….
(1).没来得及…就…
therooffellbeforehehadtimetodashintotheroomtosavehisbaby.
他还没有来得及冲进房间把孩子就出来,房顶就塌了.
heranoffbeforeicouldstophim.
tomygreatdisappointment,myfavoritesingerlefttheconcertbeforeicouldhaveawordwithhim.
(2).过了多久才怎么样,动作进行到什么程度才怎样
theywalkedaboutthirtymilestothewestbeforetheysawavillage.
theyworkeddayandnightaboutthreedaysbeforeeverythingreturnedtonormal.
threeyearspassedbeforeiknewit.
3.itwas+时间段+before….过了多久才….;itwasnotlongbefore…不久就…
itwill(not)be+时间段+before…要过多久(不久)…..才…..
eg.itwasnotlongbeforehesensedthedangeroftheposition.
itwasthreeyearsbeforehecameback.
itwillbehalfayearbeforeyougraduatefromthisschool.
4.nosooner…than…=hardly…when…一…就….,刚刚…就…nosooner/hardly+过去完成时,than/when+一般过去时
如果nosooner,hardly位于句首,主句要倒装.
hehadhardlysatdowntohavearestwhenthedoorbellrangandincameallan.
nosoonerhadhegotoffthetrainthanhisdaughterrantowardshim.
hardlyhadwearrivedwhenshestartedcryingtogohome.
5.once一旦….,表示时间和条件onceyouunderstandthisrule,youwillhavenofurtherdifficulty.
onceyouhavedecidedtodosomething,youshoulddoitwell.
onceyouenterthechemistrylab,youshouldfollowtheteacher’sinstructions.
6.since…自从….以来since引导的从句不论是延续性或非延续性动词,都表示的是动作或状态的完成或结束.
注意一下句子翻译:
sincehelivedinnanjing,ihavenotheardfromhim.(=sinceheleftnanjing…)
自从他离开南京以来,我没有收到过他的信.
sinceshewasinyangzhou,shehaskeptintouchwithherformerfriends.(sincesheleftyangzhou…)
她离开扬州以来,一直同过去的朋友保持着联系.
对比:
1).ihaveneverseenhimsincehewasill.
他病好后,我就再也没有见到他.
2).ihaveneverseenhimsincehefellill.
他生病以后我就再也没有见过他.
itis/(hasbeen)+时间段+since+过去式
itis/hasbeentwoyearssincehisfatherdied.
=hisfatherhasbeendeadfortwoyears.=hisfatherdiedtwoyearsago.
他的父亲去世两年了.
ithasbeen8yearssinceigraduatedfromuniversity.
=igraduatedfromuniversity8yearsago.
itis3yearssincehesmoked.他三年不吸烟了.(即,从句动词延续性的,译成否定意义;从句动词非延续性的,译成肯定意义.)
itis3yearssinceheleftschool.-----他毕业三年了.
7….until…直到…时候;not…until…直到…才…youaretostayhereuntil/tillyourmothercomesback.
themeetingwasputoffuntilteno’clock.
notuntilwewatchedtheearthdayprogramontvdidweknowmuchaboutglobalwarning.
=wedidnotknowmuchaboutglobalwarninguntilwewatchedtheearthdayprogram.
=itwasnotuntilwewatchedtheearthdayprogramontvthatweknewmuchaboutglobalwarming.
notuntilhefailedintheexamdidherealizethathehadwastedmuchtimeplayingcomputergames.
8.…when…引导并列分句,“当时,突然”,强调另一动作的突然发生.onedaychuckwasonaflightacrossthepacificoceanwhensuddenlyhisplanecrashed.chucksurvivedthecrashandlandedonadesertedisland.
iwaswalkingalongtheriverwheniheardadrowningboycryingforhelp.
iwasabouttoleavewhenitbegantorain.
对比:
a:
iwaswalkingalongthestreetwhenicaughtsightofatailor’sshop.
Iwaswalkingalongthestreets.justatthatmomenticaughtsightofatailor’sshop.
9.while=although尽管whileiadmitthattheproblemisdifficult,idon’tthinkthatitcan’tbesolved.
whileiadmithisgoodpoints,icanseehisshortcomings.
whileiwasangrywithher,ididn’tlosemytemper.
10.where地点状语youshouldputthebookwhereitwas.
persistentpeoplebegintheirsuccesswhereothersendinfailure.
wherethereisawill,thereisaway.
wheremenaregreedy,thereisneverpeace.
gowhereyoushould,keeponstudying.
11.as引导的行为方式状语从句.pleasedoexactlyasyourdoctorsays.
youmustdotheexercisesjustasishowyou
asitis=asthingsare照现在的情形看
hepromisedtostudyhard,butasitis,hedoesnobetterthanbefore.
leavethehouseasitis.i’dliketobuyitasitis.
12.asif(asthough)好像helookedatmeasifiweremad.
hewasingreattrouble,butheactedif/thoughnothinghadhappened.
althoughtheyjustmetforthefirsttime,theytalkedasiftheyhadbeenfriendsformanyyears.
theremanyblackcloudsinthesky.itlooksasifitisgoingtorain.
13.though,although,as“虽然”,引导让步状语从句.although位于句首;though位于句首或句中;as位于句中=though=that,它的词序是把句中强调的形容词,副词,动词或名词放在连词前.注意观察下列句式变化:
although/thoughi’myoung,ialreadyknowwhatcareeriwanttofollow.
=youngas/though/thatiam,ialreadyknowwhatcareeriwanttofollow.
althoughirespecthimverymuch,icannotagreewithhisidea.
=muchas/that/thoughirespecthim,icannotagreewithhisidea.
although/thoughheisachild,heknowsalotofchinesecharacters.
=childas/though/thatheis,heknowsalotofchinesecharacters.
althoughhetried,hecouldn’tsolvetheproblem.
=tryashemight,hecouldn’tsolvetheproblem.
althoughitisraining,iamgoingoutforawalk.
=rainingasitis,iamgoingoutforawalk.
14.evenif=eventhough即使…也…;即便…也…evenif/thoughihavetosellmyhouse,i’llkeepmybusinessgoing.
shewon’tattendsuchpartieseventhough/ifsheisinvited.
youarenotstupid.eventhough/ifyouwereslowinstudy,youshouldn’tgiveupstudies.
theboywasbadlyinjuredanddiedatlast.evenifhehadbeenattendedwithoutdelay,hecouldn’thavebeensaved.
15.whether…or…不管…还是…whethertheweatherisgoodorbad,theywillsetoffastheyplanned.
whetherhedrivesortakesthetrain,hewillbehereontime.
anyperson,whetheryoungorold,hashisworth,independentofachievements,bankaccountsorlooks.
16.疑问词+everwhatever,whoever,whichever,whenever,wherever,whoever均引导让步状语从句,相当于nomatter与what,who,which,when,where,how连用.
whatever(=nomatterwhat)mayhappen,weshallnotlosehope.
whoever/nomatterwhocomes,hewillbewelcome.
whenever/nomatterwhenithappened,itwascertainlynotyesterday.
wherever/nomatterwherehewent,hemadefriendswithpeople.
17.unless除非,如果不(=if…not)ishallgotomorrowunlessitrains.
—shalltomgoandplayfootball?
—notunlesshehasfinishedhishomework.
unlessthesunweretoriseinthewest,iwouldn’tbreakmyword.
iwon’tattendhisbirthdaypartyunlessinvited(=unlessiaminvited)
18.as/solongas只要so/aslongasyoukeepontrying,youwillsurelysucceed.
so/aslongasyousticktoyourplansforyourstudy,youaresuretomakegreatprogress.
—whatareyougoingtodothisafternoon?
—iwillprobablygoforawalklateronsolongasitstaysfine.
19.supposing/suppose(that)假定;假如suppose/supposing(that)idon’thaveadayoff,whatshallwedo?
supposexequalstoy,thenyoucanworkouttheresult.
providing/provided(that)=onconditionthat假如,在…条件下
i’lllendyouthemoneyonconditionthatyoucanreturnitinthreemonths.
i’llgoproviding/providedthatmyexpensesarepaid.
20.given(that)…=take….intoconsideration鉴于,考虑到giventhegovernment’srecordonunemployment,theirchancesofwinningtheelectionlookpoor.
giventheirinterestinchildren/giventhatsheisinterestedinchildren,iamsureteachingistherightcareerforher.
grantedthat的确
grantedthatit’sasplendidcar,buthaveyouseenwhatitcosts?
21.incasethat…万一;以防;incaseof+n万一incase(that)johncomes/shouldcome,pleasetellhimtowait.
(incasethat后谓语用一般现在时或should+动词原型)
pleaseremindmeaboutitincaseiforget/shouldforget.
pleasetakemyumbrellaincase(that)itrains/shouldrain.
incaseoffire,whatshouldwedo?
22.祈使句(表条件)+orelse/or/otherwise+主句(表结果)….否则…,要不然….pleasecallmeupbeforeyoucome,otherwise/orelse/orwemightbeout.
hurryup,oryouwillbelate.
祈使句(表条件)+and+主句(表结果)
givehimaninchandhewilltakeamile.
beunitedandcooperatewitheachotherandonlyinthiswaycanwesaveourearth.
23.as(so)…as…和…一样henryisasgoodaplayeraspeter(is).
heworkedasfastasaskilledworker(did).
wewillgiveyouasmuchhelpaswecan.
24.形容词/副词比较级+than注意:
形容词和副词的比较级前还可以加一个表示程度的修饰语,常用的修饰语是:
(1).alittle,abit,slightly稍微;一些
(2).much,alot,greatly,agreatdeal,far,byfar….得多
(3).still,even,rather更
(4).any一般用于疑问句,表示‘一些”;“稍微”
(5).倍数或数量词.
thistextisalittle(abit)moredifficultthantheother.
hehasmadefargreaterprogressthistermthanhedidlastterm.
withthedevelopmentofsociety,peopleinchinaareagooddealricherthanbefore.
heistwoyearsolderthan=heisolderthanibytwoyears.
asiaisthreetimeslargerthaneurope.
=asiaisthreetimesaslargeaseurope.
=asiaisthreetimesthesizeofeurope.
还应注意,当more作为many,much的比较级时,其修饰语分别是
(1).many,afew,+more+可数名词复数
(2)much,alittle,abit,agreatde
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