1. Mary's first request to Elizabeth was for some clothes that be fitted her status rather than the rags she had fled in.

结构剖析：这是一个含有定于从句的复合句。主句是：Mary's first request to Elizabeth was for some clothes，从句是that be fitted her status rather than the rags she had fled in。

这个定语从句是由that引导的，修饰先行词clothes。先行词在定语从句中做主语，指代物。在这个句子中that和which这两个关系代词都可以使用。由于是做主语，关系代词不能省略。

进而来看，定语从句that be fitted her status rather than the rags she had fled中rather than the rags she had fled是介词短语，rather than作为“而不是”这个意思解释时，属于符合介词。这个介词短语中含有一个定语从句： she had fled。它修饰先行词rags。这个先行词在定语从句中宾语，指代物，关系代词which和that都可以使用，由于是做宾语，可以省略关系代词。

陷阱提示：注意rag这个词要表示破旧的衣服这个意思时，要使用其复数形式，不能用单数形式，这个跟clothes这个词是一样的用法。

2. Just as well perhaps that she didn't know that Elizabeth was already wearing Mary's favourite pearls that had been stolen from Mary by her enemies and sent to the English queen.

结构剖析：这是含有定语从句的复合句。主句是：Just as well perhaps that she didn't know that Elizabeth was already wearing Mary's favourite pearls，定语从句是that had been stolen from Mary by her enemies and sent to the English queen，that是引导词。

这个定语从句修饰先行词pearls，它在定语从句中做主语，指代物，关系代词which和that都可以用，做主语不能省略。

这个定语从句时由并列连词and连接的2个并列分句：一个是：that had been stolen from Mary by her enemies，一个是sent to the English queen。第二个分句和第一个分句工用一个引导词that。And这个并列连词在这里起到承接的作用。