They became very good friends indeed, which, naturally, did not please Lord Burlesdon.

which是代表前面的整个句子吗？

【答】你的题目很大。单就这个句子而言，which指代整个主句内容，是否指代整个主句的内容，这需要根据定语从句的意思来判断：（他们成了要好的朋友），这（which）自然没有让Burlesdon勋爵高兴。which指代“他们成为好朋友这件事”，不可能指代名词“good friends”，再说，which也不能指“人”。

which指代主句中的某个词：

Last night I saw a very good film, which was about the Second World War.昨晚我看了一部非常好的电影，是关于第二次世界大战的。

My parents live in my hometown, which is about 30 kilometers from here.我的父母住我的家乡，离这里大约30千米。

关于as引导的定语从句，也有两种情况：1. 指代主句中的某个词；2. 指代整个主句内容。

as 引导限制性定语从句，指代主句中的某个词，它的先行词之前有as, so, such, the same等修饰；关系代词as 在从句中作主语或宾语。

Such people as have made great contributions to the world should be greatly respected.那些对世界做出巨大贡献的人应受到极大的尊重。（as作从句的主语）

You may take as many chairs as you need.你需要多少椅子就拿走多少椅子。（as作need的宾语）

My parents have not so much money as I want.我父母没有我需要的那么多钱。（as作want的宾语）

He made the same mistake as you made in the last exam. 在上次考试中，他犯了跟你相同的一个错误。（as作made的宾语）

as 引导非限制性定语从句，其先行词是整个主句，as指代整个主句的意思。先行词就是整个主句，它在定语从句中作主语、宾语。它引导的从句可以位于主句前，也可以位于主句后，还可以位于主句中间。

As everybody knows, Shakespeare was a great English writer.众所周知，莎士比亚是伟大的英国作家。（从句在主句之前，as作从句的宾语）

Tom is a brave boy, as is described in the report.汤姆是一个勇敢的男孩，这正如在报道中描述的那样。（从句在主句之后，as作从句的主语）

The project, as we had expected, got along well.正如我们所预料的那样，工程进展顺利。（从句在主句中间，as作从句的宾语）

    as 引导非限制性定语从句时，常见的【固定表达】：

    as we all know  众所周知         as I can remember  正如我所记得的

    as often happens  像经常发生的那样      as we expect  正如我们预料的那样

    as you see  这一点你明白  as was expected  正如预料的那样

    as can be seen  看得出来  as may be imagined  正如可以想象的那样

    as has been said above  如上所述 as we all can see  正如我们都能看到的那样

    as is often the case  像常规那样 as everybody can do  正如人人都能做到的那样