2.用于祈使句中,既表时间,又表隐含条件,可译作“要不然、否则”,近似or。如:Get out before it got worse.
Put back the book where it is before it gets torn.
3.从属连词,“宁愿……与其……”用法近似于would rather...than...如:He will die before he tells the secret.
4.从属连词,有“不知不觉某事已经完成”的意思,常见于“...before I know it”。如:We had come to the store before we know it.
5.副词,“从前,以前”,常与完成时连用。如:They have known each other long before.
【考例1】The field research will take Joan and Paul about five months; it will be a long time____we meet them again.
A. after
B. before
C. since
D. when
(B)
【考例2】He was told that it would be at least three more months_____he could recover and return to work.(07福建卷,29)
when
B. before
C. since
D. that
(B)
【考例3】 I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back.(08北京卷,34)
A. before??? B. since??? C. till??? D. after
(A)
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