子。如：Greatcha
geshavetake
placei
ourlife．Therearethreereaso
sforthis．这样写可以避免套用中的表达失误。2．表示好处1）Ithasthefollowi
gadva
tages．2）Itdoesusalotofgood．3）Itbe
efitsusquitealot．4）Itisbe
eficialtous．5）Itisofgreatbe
efittous．例如：Booksarelikefrie
ds．Theyca
helpusk
owtheworldbetter，a
dtheyca
ope
ourmi
dsa
dwide
ourhorizo
s．Therefore，readi
gexte
sivelyisofgreatbe
efittous．3．表示坏处1）Ithasmoredisadva
tagestha
adva
tages．2）Itdoesusmuchharm．3）Itisharmfultous．例如：However，everythi
gdividesi
totwo．Televisio
ca
alsobeharmfultous．Itca
doharmtoourhealtha
dmakeuslazyifwespe
dtoomuchtimewatchi
gtelevisio
．
f11
4．表示重要、必要、困难、方便、可能1）Itisimporta
t（
ecessary，difficult，co
ve
ie
t，possible）forsb．todosth．2）Wethi
kit
ecessarytodosth．3）Itplaysa
importa
trolei
ourlife．例如：Computersare
owbei
gusedeverywhere，whetheri
thegover
me
t，i
schoolsori
busi
ess．Soo
，computerswillbefou
di
everyhome，too．Wehavegoodreaso
tosaythatcomputersareplayi
ga
i
creasi
glyimporta
trolei
ourlifea
dwehavesteppedi
totheComputerAge．5．表示措施1）Weshouldtakesomeeffectivemeasures．2）Weshouldtryourbesttoovercome（co
quer）thedifficulties．3）Weshoulddoourutmosti
doi
gsth．4）Weshouldsolvetheproblemsthatweareco
fro
ted（faced）with．例如：Thehousi
gproblemthatweareco
fro
tedwithisbecomi
gmorea
dmoreserious．Therefore，wemusttakesomeeffectivemeasurestosolveit．6．表示变化1）Somecha
geshavetake
placei
thepastfiveyears．2）Agreatcha
gewillcertai
lybeproducedi
theworldscommu
icatio
s．3）Thecomputerhasbroughtaboutma
ycha
gesi
educatio
．例如：Somecha
geshavetake
placei
peoplesdieti
thepastfiveyears．Themajorreaso
sforthesecha
gesare
otfartoseek．Nowadays，morea
dmorepeopleareswitchi
gfromgrai
tomeatforprotei
，a
dfromfruita
dvegetabletomilkforvitami
s．7．表示事实、现状1）Weca
otig
orethefactthat．．．2）Noo
eca
de
ythefactthat．．．3）Thereis
ode
yi
gthefactthat．．．4）Thisisaphe
ome
o
thatma
ypeoplearei
terestedi
．5）However，thats
otthecase．例如：Weca
otig
orethefactthati
dustrializatio
bri
gswithittheproblemsofpollutio
．Tosolvetheseproblems，weca
startbyeducati
gthepublicaboutthehazardsofpollutio
．Thegover
me
to
itspartshouldalso
f12
desig
stricterlawstopromoteaclea
ere
viro
me
t．8．表示比较1）ComparedwithA，B．．．2）Iprefertoreadrathertha
watchTV．3）Thereisastriki
gco
trastbetwee
them．例如：Comparer