※ 引述《scju (QQ)》之铭言： : 大家好，请教一下 : 在Practical English Usage 3rd写道： : 177.7 comparative structures with 'as' and 'than' : 说明：We can leave out words after 'as' and 'than', if the meaning is clear. : 例句： : The weather isn't as good as last year. (= as it was last year.) : I found more blackberries than you. (= than you found.) : （请注意，这里用的是「等号」） 请注意上面两句的as 跟than都是连接词 後接主词与动词 所省略的就是动词或是主词与动词 : -------- : 581 'than' and 'as' as subjects, objects and complements : 说明：subjects: more than is necessary; as happened : 例句： : He worries more than is necessary. (NOT ... more than it/what is necessary.) : The train might be late, as happened yesterday. (NOT ... as it happened : yesterday.) : （请注意，这里明确说出了「NOT」） than 跟as当主词 後面当然接动词 : -------- : 所以我就不太懂，为何同样是as、than的比较结构，有时候主词可以选择要不要保留， : 有时候却又非删除不可？不晓得关键点在哪里呢？ 关键点在於"词性"/文法脚色 As/than 当连接词时，其後可以省略 1. 主词+ 动词 (主词语动词与主要子句一样。Weather = it) The weather isn't as good as last year. (= as it was last year.) 2. 省略动词，保留主词(与主要子句的主词不一样，但动词与主要子句的动词一样) I found more blackberries than you. (= than you found.) : 特别是这两句： : The weather isn't as good as last year. (= as it was last year.) 理由同上 : He worries more than is necessary. (NOT ... more than it/what is necessary.) 这句的than是当主词後面当然接动词is (至於为何用is 不用are这点我不清楚 只能说 在这种情况下 母语人士都用is， 至於有没有thna当主词後面动词用复数动词 的情况，那就要再深入研究了，目前我是没看到过，但不代表没有) 如果改成 He worries more than his girl firend (worries). 这时候就可以省略 後面的worries 或是 He worries more than he should. 这句话 我觉得 後面都不要省比较好 (因为前後主词虽然一样但後面的动词不一样) : 这两个it应该都和前面代指的事情重复何一个可以保留，一个一定要删除？ : 谢谢！ : PS 此篇有同步贴在英语论坛，若有回应，会将内容张贴过来，和大家一起讨论。 --

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