THEBennets were engaged to dine with the Lucases, and again during the chief ofthe day, was Miss Lucas so kind as to listen to Mr. Collins. Elizabeth took anopportunity of thanking her. "It keeps him in good humour," said she,"and I am more obliged to you than I can express." Charlotte assuredher friend of her satisfaction in being useful, and that it amply repaid herfor the little sacrifice of her time. This was very amiable, but Charlotte'skindness extended farther than Elizabeth had any conception of; -- its objectwas nothing less than to secure her from any return of Mr. Collins's addresses,by engaging them towards herself. Such was Miss Lucas's scheme; and appearanceswere so favourable that when they parted at night, she would have felt almostsure of success if he had not been to leave Hertfordshire so very soon.
请教老师：
1）repaid herfor the little sacrifice of her time. 这里的for如何理解？
2）in beinguseful 如何剖析，其中being怎么样理解？可以说成in herbeing useful 觉得是动名词词组，her是动名词的逻辑主语吗？
3）extendedfarther than Elizabeth had any conception of：这个比较句理解上有的不解，麻烦老师剖析一下，其中of的宾语呢？这个of可否省略？特别是没搞懂什么和什么在比较？
4）这里的them指代的是什么？
1 for 表示repaid是什么原因。这不是非常明显的吗？
2 in being useful 这是介词短语，being useful为动名词短语作介词in的宾语。beinguseful的逻辑主语显然是句子的主语Charlotte，没必要在此再表示动名词的逻辑主语。I hate being laughed at. 动名词的逻辑主语就是句子的主语，所以无须说my being laughed at.
3 你了解比较分句一般使用缩减形式，即尽可能使用替代和省略。所以你没必要每次见到缩减的比较分句都要试图去补全。没这个必要！！！ had any conception of= had thought. 假如你把than理解为比较替代词，than就是of的宾语。句子的意思是： Charlotte的好心超出了伊丽莎白的想象。
4 them指代前面的复数名词，你往前看，前面唯一一个复数名词就是addresses。