△状语从句讲解△第三章状语从句6
once引导时间状语从句的用法once引导时间状语从句时含有条件意味,译为“一旦”
【例12】________theydecidewhichcollegetogoto,studentsshouldresearchtheadmissionprocedures
(2010·北京)A
WhileC
UntilD
Once答案:D7
before引导时间状语从句的用法表示“在……之前”
常用的句型:Itwillbesometimebefore
意为“要过一段时间才……”
【例13】Johnthinksitwon’tbelong________heisreadyforhisnewjob
(2010·陕西)A
afterC
beforeD
since答案:C【例14】—Whydidn’tyoutellhimaboutthemeeting
—Herushedoutoftheroom________Icouldsayaword
untilC
beforeD
after答案:C注:before的反义词是after,两者可以转换
如:Wehadstayedherefourdaysbeforewewenthome
→Afterwehadstayedherefourdays,wewenthome
as引导让步状语从句的用法as引导让步状语从句时,意为“虽然”,从句中的形容词、副词、名词或动词原形置于句首
(若是名词,其前一般不用冠词
)【例37】________,hecan’tknoweverything
AsheiscleverB
AscleverheisC
CleverasheisD
Ateacherasheis答案:C【例38】Try________Imay,Idon’tthinkI’llsucceed