Question

什么是英语让步状语从句？ though, although, even if/though 引导的是吗？他们虚拟语气怎么用？

Answer 1

【1】让步状语从句是状语从句中的一种，其本身也是状语从句。引导让步状语从句的连词主要有以下这些：though,although,while,as;even if等。as引导的让步状语从句必须以部分倒装的形式出现，被倒装的部分可以是表语、状语或动词原形，though也可用于这样的结构中，但although不可以这样用。even if引导的让步从句含有强烈的假定性，可用来表示与事实相反的假设，但不能用来描述已经发生的事实。而even though引导让步状语从句时，是以从句的内容为先决条件的，即说话人肯定了从句的事实，表示已经发生了的事。
【2】though, although, even if/though 引导的是英语让步状语从句
【3】用在asif/as though,或evenif/even though引导的从句中:这时,如果从句中表示的动作发生在过去,则谓语动词用had＋过去分词形式；如果指的时现在的状况,则用过去式 (be用were)；指将来则用would(should,could)+动词原形.这里只看从句动作发生的时间,与主句的时态没有关系.
Forexample:
Some metals look at first sight as though they weregold.
He looked as if he were an artist.
He speaks English so fluently as if he had studiedEnglish in the U.S.
He always sounds as if he would help you.
When a pencil is partly in a glass of water,itlooks as if it were broken.
Even if he were here,he could not solve theproblem.