果没有他的帮助，我们就不会成功。Shoulditrai
tomorrowIfitshouldtomorrowwhatwouldyoudo如果明天下雨，你们怎么办？2虚拟条件从句没有werehad或should等助动词时，不能通过添加did的方式构成倒装。正确Ifhesmokedlesshewould
’tcoughsomuch如果他少抽点烟，就不会咳嗽得这样厉害。错误Didhesmokelesshewould
’tcoughsomuch练1thecha
ceariseI’dlovetogotoBeiji
gAWouldBShouldCShallDCa
提示本题考查虚拟条件句中省略if的用法。句意为假如有机会，我就去北京。答案B2forthetimelyi
vestme
tfromthege
eralpublicourcompa
ywould
otbesothrivi
g兴旺的asitisAHadit
otbee
BWereit
otCBeit
otDShouldit
otbe提示从句意来看，条件句表示的是与过去相反的假设，主句表示与现在相反的事实。这种虚拟句叫做“错综时间条件句”。故选A项。条件句补上if，就成为ifithad
otbee
forthetimelyi
vestme
tfromge
eralpublic。答案A辨析1bek
ow
asbek
ow
forbek
ow
bybek
ow
to1bek
ow
as意为作为知名；被称作是；大家公认为；叫作。as后接表示“身份”的名词。2bek
owfor意为因而出名；因而众所周知。for后接表示“原因”的词。3bek
ow
by意为凭而知。by表示手段或标准，作“通过、按照”讲。4bek
ow
to意为为所周知；为所熟知。介词to后的名词或代词为“知情者”，不可以用by。
f即时练习用as，for，by或to填空1Copacaba
aalsok
ow
________________the“Pri
cessoftheSea”hasjustcelebrateditso
ehu
dredthbirthdaya
dismorebeautifultha
ever2Thefestivalk
ow
_______________Car
ivaliso
eoftheworld’smostfamousa
dattractsvisitorsfromallovertheworld3Thereareple
tyofeasierslopesa
dKitzbuheliswellk
ow
____________itsma
yskischool4TodaytheSouthisk
ow
______________itsfrie
dlyatmosphere5O
eca
bek
ow
___________hiswordsa
ddeeds6Heisk
ow
_________everyo
e____________agooddoctor7Itisk
ow
_______________usthatChi
aisadevelopi
gcou
try8Thema
isk
ow
______________theperso
shemakesfrie
dswith答案1as2as3for4for5by6toas7to8by2k
owk
owofk
owsth与k
owofsth的区别在于k
owsth表示直接“认识”或“知道”某事物；而k
owofsth表示“得知，了解，听说过”。即时练习1Whiletheyaremy
eighboursIdo
ot_________________themwell2Ido
’tk
owhimbutI_______________________him3Ateacheraboveallshould_______________howtodealwiththeproblemstaki
gplacei
classcorrectly4Doyou____________________a
yo
eherewhoisabletospeakseveralforeig
la
guages5I______________herbutIdo
ot_________herper