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昨日尘风
Although引导的状语从句转化成As引导的状语重句。仅此。as 引导让步状语从句的情况: 1) 主+系+ 表(形容词、名词) 表(adj)+ as + 主+系 Young as he is, he knows a lot. 表(n )+ as + 主+系 Child as he is, he knows a lot. (名词前不能加冠词) 2)主+ 谓+ (宾)+状语 状语+ as +主+ 谓+ (宾)Many times as he failed the experients, he never lost courage. Early as he got up, he couldn't catch the early train. 3). 主+ 情态动词+动词原形 动词原形+ as + 主+ 情态动词 Try as he might, he couldn't open the door. 不符合上述情况的不能用as 引导让步状语从句。