3 than从句后面可以省略主语it吗（than it had looked）
We
worked for several hours and we were happy to see that the forest looked cleaner
than it had looked before.
请问这里 than 后面的主语 it 可以省略吗？
比如像下面这样的句子：
The results are less satisfactory than had been anticipated. 结果没着预期的那么令人满意。
There
were many more deaths than was first supposed. 死亡的人数要比最初预想的多得多。
最佳答案 2022-04-01 08:14
We worked for several hours and we were happy to see that the forest looked cleaner than it had looked before.
句中 than 后面的主语 it 不可以省略——关于这个问题，本站已有不少讨论，你可以根据关键词搜索一下，认真去看看。尤其是剑桥语法提到的观点，值得注意。
关于 than 比较分句省略主语，主要限于以下两种情况：
一是than分句的主语属于主句比较项的对应成分（此时习惯上必须省略）。如：
(1) More trees were cut than were planted. 砍伐的树比种植的树要多。（比较分句省略的主语与主句中的比较项 more trees相对应，所以必须省略）
(2) More food is wasted than is eaten in this canteen. 在这个食堂里浪费的食品比吃掉的还多。（比较分句省略的主语与主句中的比较项 more food 相对应，所以必须省略）
(3) More people died of flu in 1919 than were killed in the First World War. 1919年死于流感的人比第一次世界大战死的人还多。（比较分句省略的主语与主句中的比较项 more people相对应，所以必须省略）
二是than分句使用了形式主语而将真实主语外置，此时既可省略形式主语和外置主语，也可以不省略（同时省略或同时保留）。如：
(1) The situation was even worse than was supposed. 情况比料想的还糟。（=…than it was supposed that the situation should be.）
(2) Never give him more money than is necessary. 不要给他超出需用的钱。（=…than it is necessary that you should give him.）
(3) More middle-aged persons suffer from hypertension than is generally realized. 患髙血压症的中年人比一般了解到的要多。（=…than it is generally realized that they would suffer.）
下面分析一下你的句子：
(1) The results are less satisfactory than had been anticipated. 结果没着预期的那么令人满意。（比较分句省略的主语与主句中的比较项less satisfactory 相对应，所以必须省略）
(2) There were many more deaths than was first supposed. 死亡的人数要比最初预想的多得多。（=…than it was first supposed that there should have been.）
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