请指出as和while引导让步状语从句的区别 as与while在引导让步 状语从句时有何区别？
as\u548cwhile\u5f15\u5bfc\u8ba9\u6b65\u72b6\u8bed\u4ece\u53e5\u7684\u65f6\u5019\u6709\u4ec0\u4e48\u533a\u522b\u610f\u601d\u4e0a\u662f\u6709\u533a\u522b\u7684\uff1aas\u662f\u867d\u7136\uff0c\u4f46\u662f while\u662f\u7136\u800c
\u7528\u6cd5\u4e5f\u4e0d\u540c\uff1aas\u5f15\u5bfc\u7684\u7684\u8ba9\u6b65\u72b6\u8bed\u4ece\u53e5\uff0c\u8bed\u5e8f\u4e3a\u90e8\u5206\u5012\u88c5\uff1aSmall as it was\u2026\u2026\u3001Try as I might\u2026\u2026 while\u5c31\u4e0d\u7528\u5012\u88c5
\u4e8c\u8005\u90fd\u53ef\u4ee5\u8bd1\u4e3a\u201c\u5c3d\u7ba1\u201d\uff0c\u4f46\u662fas \u505a\u5f15\u5bfc\u8bcd\u65f6\u5019\uff0c\u53e5\u5b50\u8981\u5012\u88c5
e.g\uff1aTry as he might\uff0che couldn\u2019t lift the stone. \u5c3d\u7ba1\u4ed6\u53ef\u80fd\u8bd5\u4e86\uff0c\u4f46\u4ed6\u4e3e\u4e0d\u8d77\u8fd9\u5757\u77f3\u5934\u3002
\u800cwhile\u5c31\u4e0d\u9700\u8981\u5012\u88c5e.g\uff1aWhile he has many good points, Tom has his shortcomings. \u867d\u7136\u6c64\u59c6\u6709\u8bb8\u591a\u4f18\u70b9, \u4f46\u4e5f\u6709\u7f3a\u70b9.
adj+as sb be young as he is ，he can do a lot of things 尽管他很小
N+as sb be child as he is 。。。。 尽管他是个孩子
ADV+as sb does well as he does 经管他做的很好。
首先，AS引导的让步状语从句的倒装说明as是必须要存在的，具体的三种情况如下：
形容词+as+sb+be/实意动词 译为：尽管某人是怎么样的或尽管某人看起来怎么样。当然sb可以换做sth，之所以这里还可以用实意动词，其实就是系动词，因为系动词也可以跟表语（形容词），比如尽管某物闻起来怎么样，尝起来怎么样。
名词+as+sb+be 译为：尽管某人是什么，比如：尽管他是孩子，只能用be动词
副词+as+sb+实意动词 译为：尽管某人做的如何，因为是动作，所以要实意动词，并且是副词修饰。
其实很容易，比如原句though he is young ，根据第一个套法。 young as he is
原句though he makes it well 根据第三种套法： well as he makes it
原句 though she is a girl 根据第二种套法： a girl as she is
希望对你有帮助~~
让步状语从句表示：虽然，尽管，即使等概念，由although（尽管）, though（尽管）, however（无论怎样）, whatever（无论什么）, whoever（无论谁）, whomever（无论谁）, whichever（无论哪个）, whenever（无论何时）, wherever（无论哪里）, whether（是否）, no matter (who, what, where, when, etc) （无论……）, even if（即使）, even though（即使）等词引导。
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