南通高等师范学校外语系
综合英语课程
U
it1Talesoftheu
explai
edPeriodThreeWordpower
Howca
aspaceshuttlebese
ti
tospaceCa
itflyi
tospacebyitselfWiththesetwoquestio
syoushouldfocuso
readi
gtheposterthescie
tistisshowi
gtoyouBythewaydoyouk
owthediffere
cesbetwee
spaceshipa
dspaceshuttle▲Aspaceshipisavehicleforcarryi
gpeoplethroughspace▲Aspaceshuttleisavehiclethatisdesig
edtocarrypeoplei
tospacea
dbacktotheEarthseveraltimestodoexperime
ts
PeriodfourGrammara
dUsage
Prese
tperfectte
se1Usediffere
tmethodstoprese
ttheprese
tperfectte
seHerearesomeideas1Pleaselookatthescree
Payatte
tio
tothediffere
tformsoftheverbs2Let’scompletethefollowi
gse
te
cesi
whichthepredicatepartismissi
gWe_____studyE
glishforaboutfiveyearsThey_____livei
thesouthsi
cetheirdaughterwasbor
I_______readyourarticlethreetimesItswellwritte
Thestude
t________fi
ishherhomeworkalreadyEric__________gobacktohishometow
todayA
swershavestudiedhavelivedhavereadhasfi
ishedhasgo
e
3Readthefollowi
gse
te
cesa
dpoi
toutwhatte
seorte
sesareusedi
thema
dthereaso
swhytheyareusedWehavestudiedE
glishforaboutfiveyearsWebega
tostudyitfiveyearsagoTheymovedtothesouthi
1990a
dhavelivedtheresi
cethe
Thestude
tisdoi
gherhomeworkShehas
tfi
ishedityetEriclefthomelastyeara
dhasjustcomeback2Wemaywo
derwhysomeverbsca
tbeusedi
theprese
tperfectte
seLet’sreadthefollowi
gse
te
cesa
dtrytofi
ddiffere
tusagesofsomeverbsJusti
hasbee
awayfromhomeforseveraldaysHedisappearedlastFridayTheyboughtthishousethreeyearsagoa
dtheyhavelivedheresi
cethe
Mybrotherwe
ttoseemygra
dpalastweekHehasvisitedhimthreetimesthismo
thSoyouseewhe
a
actio
happe
soveraperiodoftimethatbega
i
thepasta
dco
ti
uestotheprese
ttheprese
tperfectte
seisofte
usedWhe
a
actio
happe
edatadefi
itetimei
thepastthepastsimplete
seisofte
used
f南通高等师范学校外语系
综合英语课程
3ReadPoi
ts1a
d2o
page8tomakesurewhytheprese
tperfectte
seisusedi
thesetwose
te
ces4GooverPoi
t3o
page8tolear
whattimeexpressio
sca
beusedwiththeprese
tperfectte
sePayatte
tio
tothediffere
tusagesbetwee
alreadya
dyetorfora
dsi
ce5ReadPoi
t4o
page8tolear
thattheprese
tperfectte
seca
beusedi
asituatio
wheretheactio
wascompletedo
lyamome
tagoI
thiscasejustisused6GooverPoi
ts5a
d6o
page8a
d
otethatwhe
wewa
ttoexpressarepeatedactio
weusetheprese
tperfectte
sewiththetimeexpressio
so
cetwicethreetimes7Let’sreadthediarye
trya
dthe
completeitusi
gthecorrectformsofther