only when we find the crest can we have a new ruler

题目

only when we find the crest can we have a new ruler
can 能否去掉 或者变成 we can have

答案

only引导的且是第一人称的句子要倒装,所以不能变为we can have.如果是假设句的话不能省略can,但是若是因果句就可以省略