“名词/形容词/副词/动词+as从句”既可以表示让步，也可以表示原因。因此，在进行转换时，要根据其具体含义，或变为although/though从句，或变为as从句。比较：
他虽然还是个孩子，但知道死亡意味着什么。
Child as he is，he knows what death means. （表示让步。另外注意，这种句中的名词（child）前不用任何冠词）
由于还是个孩子，他不知道死亡意味着什么。
Child as he is，he doesn't know what death means. （表示原因）
=As he is a child，he doesn't know what death means.
Hard as he may try，he won't get it. 不管他怎样努力，还是得不到它。
=Although he may try hard，he won't get it.
=However hard he may try，he won't get it.
=No matter how hard he may try，he won't get it.