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1、引导目的状语从句的从属连词
1、主要的有 in order that, so that, in case, for fear等:Speak clearly so that they may understand you.讲清楚些,以便他们能理解你。He studied hard in order that he could pass the exam.他努力学习以便能考试及格。Shut the window for fear that it may rain.把窗子关上以防下雨。
2、【注】so that 引导目的状语从句时有时可省略so而只用that,有时也可只用so:Bring it closer that I might see it better.拿近些,使我能看得清楚些。I’ll show you so you can see how it’s done.我将做给你看,以便你知道应怎样干。
3、为了简洁起见,当目的状语从句的主语与主句的主语相同时,目的状语从句有时可用表目的的不定式短语替换:He got up early so that he could catch the early bus. / He got up early so as to catch the early bus.他起床很早以便赶上早班车。He came in quietly in order that he shouldn’t wake his wife. / He came in quietly in order not to wake his wife.他轻轻进来,以免把他妻子吵醒。有时还可与表示目的的介词短语替换:He left an hour early for fear he might miss the train. / He left an hour early for fear of missing the train.他提前一小时离开,以免错过火车。
4、in case既可引导目的状语从句,也可引导条件状语从句,主要视句意而定:In case he comes, let me know.如果他来,告诉我一声。Tell me in case you get into difficulty.遇到困难请告诉我。
5、【注】in case引导目的状语从句,从句有时可用“should+动词原形”这样的形式:Take your coat in case it rains (should rain).带着雨衣以防下雨。
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