要过……才能做 It will not be +一段时间+before从句
要不了…… 就能做 It was +一段时间+before从句(did) 过了……做了…… It was not+一段时间+before从句(did)
没过……做了…… 4、 before 3.(2010·陕西高考)John thinks it won't be long ________he is ready for his new job. A.when
B.after C.before
D.since 【解析】 考查时间状语从句。 【答案】 C 4.(2011·四川高考)As is reported,it is 100 years ________ Qinghua University was founded. A.when
B.before C.after
D.Since 【解析】 It is some time since...为固定句型 【答案】 D 5、since It is/ has been +一段时间+since 从句(did) It is 10 years since I smoked.(=I gave up smoking/dropped smoking)
自从我不抽烟已有三年了. 延续性动词:反过来翻译 短暂性动词:直译 We waited till (until) he came back .
She didn’t stop working until eleven o’clock .
如主句动词是延续性动作,常用肯定式,表示“直到…为止”;如主句动词是瞬间动词,常用否定式,表示“直到…才” 6、 till /until Not until 句型 与强调句型结合 I didn’t go to sleep until he came back.
与倒装句式结合 It was not until he came back that I
went to sleep. Not until he came back did I
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