When we leave is for him to decide为什么不可以说成When shall we leave is for him to decide.两者有何区别
问题描述：
When we leave is for him to decide
为什么不可以说成When shall we leave is for him to decide.
两者有何区别
答
When shall we leave - 我们该什么时候走
When we leave - 当我们走时候
还有 不是 is 而是 it
答
when we leave是句子主语
when shall we leave就是问句的句头了 不能这么说