By next sunday she will have stayed with us for three weeks为什麽不用 she will has stayed而是用will have stayed?是因为will 后面必须跟动词原型的原因吗?>_

问题描述:

By next sunday she will have stayed with us for three weeks
为什麽不用 she will has stayed而是用will have stayed?是因为will 后面必须跟动词原型的原因吗?>_

你说的对,就是因为will