延续性的，不能用点动词。（如begi
，stop…）
Eg：WhileIreadshesa
gEgIe
teredtheroomwhile（whe
）LiMi
gwastalki
gwithher
（2）si
ce引导的是一个过去时的句子，说明自当时以来到现在（自从两年前以来），主句一般要用现在完成时。EgIhavelear
edmoretha
twothousa
dE
glishwordssi
ceIbega
lear
i
gE
glishtwoyearsago
（3）till和u
til若主句的动词是终止性动词，则要用否定式。EgIdid
tgotosleepu
til（till）Ifi
ishedmyhomeworkEgWewo
tworku
til（till）ourteacherteachesushowtodoitEgHestayedtheretillu
tilhismothercameback
（4）EgWhe
hearrivestherehewillcallyouEgHecametoChi
aafterthewarwasoverThewarwasoverbeforehecametoChi
aEgAssoo
asIgettheprese
tI’lltellyou
3、because：因为，连接原因状语从句（1）回答Why问句时，只能用because，不能用for或as
EgWhyareyoulate？BecauseImetatrafficaccide
to
mywayhere
（2）汉语中，我们经常说因为……所以，但在英文中有了because，就不能再用so。Eg（×）Becausehewastired，sohecould
twalkthere
4、if，though（although）（1）if：如果（引导条件从句）
EgYouca
passtheexamifyoustudyhard
（2）though，although：虽然（引导让步状语从句）和原因状语从句一样，如果用了though，although（虽然）就不能再用but（但是）。
EgAlthough（Though）Ilive
earthesea，Im
otagoodswimmerIlive
earthesea，butIm
otagoodswimmer
5、so…that：太……以致……若that后跟的从句是否定从句，可以与tooto互换。
EgHeissooldthatheca
tworkHeistoooldtoworkEgTheboxissoheavythatIca
tliftitTheboxistooheavyformetoliftEgThegirlissobeautifulthateverybodylikesher注意注意此句型与too…to的互换。so…that在肯定句中不能转换成too…to…。
f代词专项习题
1Goi
gtothemoviesisgood，________Ireallyo
lylikeliste
i
gtomusic
Aa
d
Bbut
Cso
Dor
2Thetomatoisi
factafruit，________itiseate
asavegetable
AbecauseBif
Cwhe

Dalthough
3Getupearly，________you’llbelateforschool
Aso
Ba
d
Cor
Dbut
4________mycousi
isveryyou
g，________sheca
helpwiththehousework
AO
ce；不填BThough；butCAlthough；不填
5Iwillbeveryhappy________youcometomyparty
Aif
Bthough
Cor
6Hehadabadcold，________hekepto
worki
gasusual．
Aso
Bbut
Cthough
7Whathappe
edjust
ow？Acarhita
oldladyatthecrossi
gShewashurt，________
otbadly
Aa
d
BorCo
ly
Dbut
8________Ilivei
asafecommu
ity，Istillfeelalittleworriedwhe
Igooutat
ight
AAlthoughBSi
ceCU
til
9Bequiet，mykids，__r