b动词是什么意思?
问题描述：
b动词是什么意思?
答
be动词就是be,不过存在有不同的时态而已
现在时：I am, You are, He is
过去时：I was, You were, He was
完成时：I have been
所以有这几个形态：am, are, is, was, were, been