请问这句英语有语法错误吗？是什么意思？

Question

Only by saving the environment can we save ourselves.

Answer 1

正确的，这是only 加介词短语作状语，提前，后边句子用部分倒装。意思是：只有拯救了环境，我们才能拯救自己。再来一个例句：Only in this way can you make progress in your English listening. 还可以接从句也是一个原则，如：only after he finished his work was he allowed to go out.

Answer 2

我们只有通过拯救环境才能拯救我们自己...、不知道语法有没有错误的某飘过、

Answer 3

错了，我想你是想说只有拯救了环境才能拯救我们自己，only to save the environment then can save ourselves。

Answer 4

有语法错误，应该为：we only can save ourselves by saving the environment,我们只有保护环境才能拯救自己