请判断以上观点哪个是正确，并说出原因，如果都不正确，请说出正确观点。

He ate more than is good for him.

观点(1)than引导比较状语从句，than代替先行词more并在比较状语从句作主语.

观点(2)than引导比较状语从句，在从句不作成分，后面省略了it is good for him to eat.即完整内容为“He ate more than it is good for him to eat”

回答之前先分析一下比较分句的逻辑。

并列句：Tom is 1.8 metres and John is 1.6 metres.

主从复合句：Tom is taller than John is.（从句表语为比较对应项，必须省略。）

并列句：To eat 400 gram rice a day is good for him, but he eats 2 kg rice a day.

主从复合句：He eats more than it is good for him to eat. (to eat的宾语为比较对应项，必须省略。）to eat+省略的比较对应项与主句结构相似，故作外置主语的不定式连同形式主语it一起省略，得到：He eats more than is good for him.

并列句：400 gram rice a day is good for him, but he eats 2 kg rice a day.

主从复合句：He eats more than is good for him. (从句主语为比较对应项，必须省略。）

通过以上分析可知，对于He eats more than is good for him.可以有二种不同解释，取决于如何理解is good for him的主语。

上述观点（1）认为than替代more，并在从句作主语，却没有说明than是何词类，不够完整。观点（2）认为than是连词，在从句中不作成分，却没有解释to eat的宾语，也不够完整。故以上二种观点都有欠缺之处。

问题(2)

请说出下列哪些句子是正确的，并说出原因。如果都不正确，请写出正确句子。

(1)These mooncakes are more delicious than (those that) were bought yesterday.

(2)These mooncakes are more delicious than (the ones that) were bought yesterday.

(3)These mooncakes are more delicious than (what) were bought yesterday.

以上三句都不应打括号，因为打括号给人的感觉是括号内的词项可有可无，实际情况是没有括号内的词项，则比较分句为错误。去掉括号后三个句子结构相同，than后都是从句的主语，省略了系词were, 表语为比较对应项必须省略。

(4)These mooncakes are more delicious than were bought yesterday.

第四句为语法错误。比较分句只有谓语没有主语。比较分句省略主语而保留谓语动词必须满足下列条件之一：

1 主语为比较对应项；此时主语必须省略。

2 主语为形式主语it，真正主语从句外置。此时it与外置主语同时省略。

第四句不符合这二个条件之一，故为语法错误。

问题(3)

翻译下面句子并分析这个句子语法结构

The word “numberless” means “more than can be counted”

翻译：numberless的意思是多得不计其数。

结构分析：

numberless为同位语，more than can be counted为宾语，句子为主谓宾结构。

宾语的进一步分析：more为中心词，than比较分句修饰more，比较对应项在分句中作主语，必须省略。故分句结构为than+谓语。

如果认为than是代词，替代more隐含的名词，则可以认为than在比较分句作主语，根据这种分析，则than从句不存在省略。但这种分析方法为极少数人的主张，尚未被广泛接受。