as引导让步状语从句吗?
有，as可表示让步，作“尽管”解，引导让步状语从句。当主句的谓语动词是be或其他系词的限定形式时，常用于“名词〔形容词，过去分词〕+as+主语+be〔其他系词〕”的限定形式（名词位于句首时一律不用冠词）;
当主句的谓语动词是行为动词时，常用“副词+as+主语+行为动词(+其他附加成分)”的形式。有时也把动词放在从句句首，尤其是有may，might，will，would等情态动词时。注意当主语是名词时常用倒装语序，主语是代词时则不用倒装语序，主语位于谓语之前。
as释义：
adv. 同样地；例如；被认为
prep. 作为；如同
conj. 因为；像；当 ... 之时；像 ... 一样；结果；尽管
n. 阿斯（古罗马重量单位，约373克；古罗马铜币名）
as于12世纪晚期进入英语，直接源自古英语的alswa，意为的确如此。
双语例句：
He was unable to make much progress,hard as he tried.
尽管他努力了,但他没能取得多少进步。
扩展资料：
1、because
读音：英 [bɪ'kɒz] 美 [bɪ'kɔːz]
conj. 因为；由于
I study because I want to learn.
我学习是因为我想学到知识。
2、since
读音：英 [sɪns] 美 [sɪns]
conj. 因为；既然；自从
prep. 自从
adv. 此后
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了。
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