hadva
tagesa
ddisadva
tages．2．Livi
gi
acityhasbothadva
tagesa
ddisadva
tages．3．Comparedwithcars，bikeshavetheiradva
tagesa
ddisadva
tages．举一反三：
f1．Althoughcomputersbri
gpeoplealotofco
ve
ie
ce，theyhavema
ydisadva
tages．2．．．．hasma
yadva
tages．Forexample，．．．However，justaseverycoi
hastwosides，．．．hasitsdisadva
tages．（本例将利弊分开讲，转折过渡自然。justaseverycoi
hastwosides也很值得背诵。）II．．．．play（s）a
importa
trole／parti
．．．……在……中扮演重要角色／起重要作用。例如：1．Computersplaya
importa
trolei
scie
cea
dtech
ology．2．Computersplayamorea
dmoreimporta
trolei
ourlife．Computersplaya
i
creasi
glyimporta
trolei
ourstudies．3．Educatio
playsa
importa
tparti
developi
gourmi
d．4．Addictio
toalcohola
ddrugsplayarolei
homeless
ess．举一反三：1．Advertiseme
tplaysa
i
formativerolei
ourdailylife．2．I
thepast，lettersplayedadecisiverolei
lo
gdista
cecommu
icatio
．But
ow，telepho
e，email，faxhavetake
theirplace．III．Withthedevelopme
tof．．．，随着……的发展，例如：1．Withthedevelopme
tofoureco
omy，ma
yChi
esefamiliesca
affordacar．2．Withthedevelopme
tofoureco
omya
dsociety，pollutio
ismorea
dmoreserious．
f3．Withtherapiddevelopme
tofscie
cea
dtech
ology，peopleca
getacollegedegreebytaki
go
li
ecoursesathome．4．Withthecurre
tsociala
dtech
ologicaldevelopme
ts，employeeswithmorek
owledgea
dhigheracademicdegreesare
eeded．举一反三：1．Withtherapidi
creaseofChi
aspopulatio
，housi
gproblemisbecomi
gmorea
dmoreserious．随着中国人口的急剧增加，住房问题越来越突出。2．Withmorea
dmorewome
e
teri
gsociety，peoplesattitudetowardswome
ischa
gi
g．随着越来越多的妇女走入社会，人们对妇女的态度也在改变。3．Withthedeepe
i
gofChi
esereforma
dope
i
gup，a
i
creasi
g
umberofChi
esefamiliesca
affordacar．随着中国改革开放的深入，越来越多的中国家庭买得起车了。（“越来越多”除了常用的morea
dmore外，还可以用a
i
creasi
g
umberof，agrowi
g
umberof，asig
ifica
t
umberof，agreat
umberof等来表达。）本结构看似固定，实则富于变化，只要记住with有“随着”的意思，相信大家可以根据实际的需要造出更多的句子。我们已经看到，开门见山的开头使论文直切主题，直白明确地提出了论点。不过在讨论某些有争议性的问题时，就显得有欠缺，因为我们必须在文章的开头引出人们对要讨论的问题的不同看法，然后再表明
f自己的观点。下面就是专门针对争议性论文的一种句型。IV．Whe
itcomesto．r