when,while ,until,till ,as soon as ,as ,after ,before,引导的时间状语从句的用法

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• 状语从句中“when while as soon as before”等引导词的区分.
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• 请教几道状语从句的题可以不用全做出来.因为是新号没有积分,没法给大家了,1.——Are you ready for Spain?——Yes,I want the girls to experience that (_____)they are young.A.while B.until C.if D.before2.(_____)well prepared you are,you still need a lot of luck in mountain climbing.A.However B.Whatever C.No matter D.Although3.The American Civil War lasted four years (______)the North won in the end.A.after B.before C.when D.then4.The old tower must be saved,(______)the cost.A.however B.whatever
• After he had locked the door,he left home 这个句子是一个复合句么他是否是复合句,如果是,时间状语是什么,这是一个什么从句它的用法是主句一般过去时,从句过去完成时么before引导的又咋解释
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• ——It was raining——he reached home ——He left school——he cleaned the classroom 填when,while等这两句有什么区别额.还有as until这两个词在时间状语从句的用法
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