A is more than sb can do是什么意思？
The beauty of the seashore is more than one can describe.
请问老师：1.A is more than sb can do.这句话，than引导的是一个从句，那么A是一个名词，A为什么可以比一个从句更多？than后面省略了什么？A is more than B 完整形式是不是应该是A is more than B is.即The beauty of the seashore is more than The beauty of the seashore that one can describe is.
The beauty of the seashore is more than one can describe.
翻译成为中文就是： 海岸边的美景 远远超出任何一个人能够描述的(美景)。
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句子的结构是 A is more than B.
A =The beauty of the seashore海岸边的美景
B=(the beauty of the seashore that) one can describe.一个人能够描述的(美景)
比较的东西都是一样的 ---美景。
勤学好问天天进步！
追问A is more than B 完整形式是不是应该是A is more than B is.即The beauty of the seashore is more than The beauty of the seashore that one can describe is.
追答A is more than B 完整形式
一般 应该是A is more than B is.
但是，The beauty of the seashore is more than The beauty of the seashore that one can describe is.中的is就已经是多余的了。因为 定语从句中 已经有谓语动词。
勤学好问 天天进步！
具体翻译需看语境。你的句子可翻译成：海岸美景难于描述追问
请问老师 A is more than B 完整形式是不是应该是A is more than B is.即The beauty of the seashore is more than The beauty of the seashore that one can describe is.
追答A is more than B 可以等于A is more than B is加形容词原籍级。但than引导的是比较状语从句，从句中的系表承前省略了。如iam taller than he.等于i am taller than he is tall.
这与你的例句是不同的。你的句子主语是beauty。more than可以看作是一个短语意思是超过。后面的句子可以看作是省略what的名词性从句作介词than的宾语。这种解释也是某些语法家的看法。本人认为你的例句中more 不是形容词而是不定代词相当于more加名词，所以这种情况下可以把than引导的从句看作定语从句。本句其实并没有比较的意思。所以你的推论不妥。如果是比较应该是the seashore is more beautiful than one can describe it。
你的句子相当于the beauty of the seashore is more than the beauty that one can describe.
The beauty of the seashore is more than that one can describe it。
The beauty of the seashore is more than that that one can describe 。
The beauty of the seashore is more than what one can describe.
The beauty of the seashore is more than the beauty that one can describe is.补全是这样吗？