how about 和how be后面是否分别跟短语和句子?

1.how about
搭配某物
How about a cup of tea?
搭配动名词'V-ing'
How about joining us for lunch?
询问关于某事的意见
How about it? Do you want to come along?
How about you?
2.how be
How is it that he left early?他为什么那么早走
How is she today?她身体怎么样?
How is the education condition there?
当地受教育状况是怎样的
How is your library using it?
你的图书馆是怎么用的呢