请问 我看书上
现在简单式 He works.
现在完成式 He has worked.
未来完成式 He will have worked.
为什么不是 He will has worked. (He单数，不是用has ?)
自已是想说 , 如是we
现在简单式 We work.
现在完成式 We have worked.
未来完成式 We will have worked.
程度很差，谢谢帮忙解答

will 助动词 要加V原