求助，曼哈顿的一道题

科科的迷妹

曼哈顿比较章节后面的一道习题
A leopard cannot run as fast as a cheetah.
A leopard cannot catch a wildebeest as fast as a cheetah.

为什么第一个句子是对的，第二个不对。谢谢大神！

Bradz

我觉得一个general rule就是，如果省略比较的动词不影响原文意思，就可以省略；反之则不行。

A leopard cannot run as fast as a cheetah和A leopard cannot run as fast as a cheetah runs的意思一样，那么后面这个runs可以去掉。

A leopard cannot catch a wildebeest as fast as a cheetah和A leopard cannot catch a wildebeest as fast as a cheetah catches的意思不一样，那么后面这个catches不仅不可以去掉，还要补充全。

我的理解，请大家指错。