1.I can carry as much paper as you can（you can 在这里怎么翻译）
2.how good a teacher she is （为什么 she is 放在最后）
3.The rarer it is, the more it is worth.（这里的 it is 怎么也是最后）

1 as much as 达到....那种程度 几乎等于, 和...差不多
连接前后句子，意思是我不能携带“你能携带的”那么多纸。
我不能像你那样携带那么多纸。这里you can后面省略了carry,因为它与前面句子的谓语 carry一致。

you can=you can carry你所能携带的

2 强调句型
how +形容词+名词+主语+动词
how good a teacher she is！ 多好的一个老师啊！
=what a good teacher she is!

3 the +比较级+主语+动词， the +比较级+主语+动词
固定句型，越...,越...
The rarer it is, the more it is worth.
它越稀有，就越值钱。
（=it is rarer, it is worth more）

【几个例子】
the more ..., the more ...越…越…
The more angry he became, the more she laughed at him.
他越生气，她就越笑他。
the more ..., the less ...越…越不…
The more difficult the questions are, the less likely I am to be able to answer them.
问题越困难，我就越不可能回答。