浅谈as引导的让步状语从句as除了引导原因状语从句、时间状语从句外，还可引导让步状语从句，但从句须用倒装语序。这时，as意为“虽然”“尽管”，等于though。Praisedashewas,heremainedmodest.他虽然受到表扬,但仍然保持着谦虚。
Long as the sentence is, its structure is very simple.
句子虽长,但其结构很简单。
说明： 如果表语为单数可数名词，这个名词不带冠词。例如: Child as he is,he knows a lot.虽然他还是个孩子，却懂的很多。
二、如果句中谓语包含情态动词或助动词，则将实意动词放在as之前。例如:Try as I might,I couldn't lift the stone.
我使多大劲儿也搬不动这块石头。
Praised as he was, he remained modest.
他虽然受到表扬,但仍然保持着谦虚。
三、如果句中谓语仅有实意动词，则将实意动词{原形}放在as之前,并在主语后面加助动词do。例如：Torture her as they did, the enemy got nothing out of her.
虽然敌人拷打她,却没有能从她嘴里得到什么。
说明： 但是，如果在这种情况下，句中谓语有副词修饰，则将副词放在as之前。例如:
Again and again as he failed, he didn't lose heart.
他虽然多次失败，但仍不灰心丧气。
Much as I admire his courage;I don't think he acted wisely.
我虽然佩服他的勇气，但是我认为他这样做是不明智的。
Exercise:根据汉语意思，完成下列句子。
1.尽管这事看上去奇怪,但却是真的。
( ), it is true.
2.虽然他是位百万富翁,但是他买不回时间。
( ) , he cannot buy back time.
3.尽管他很用功,但考试不及格。
( ), he didn't pass the exam.
4.不管我学习怎样努力，都赶不上他们。
( ),l couldn't catch up with them.
Key:1. Strange as it seems .
2. Millionaire as he is.
3. Try as he might.
4.Hard as l study.
