we should do everything we can to protect the environment.这是什么句子啊?can后怎么接to

题目

we should do everything we can to protect the environment.这是什么句子啊?can后怎么接to

答案

can 后面省略了do.
其实原句是这样的：we should do everything we can do to protect the environment.
we can do 是 everything的定语从句,怎么样的事呢!我们能做的