what about doing 是固定用法么

1.What about + sth/ doing sth.
表示某事/做某事怎么样？

没有，主谓结构哦。当作固定用法看啦。

2.
How /What about you? 后面直接，跟人称代词， 也可以跟名词吧？如How abuot Tom?

尽管没动词，但是不是属于一种固定表示方法？？

what about 后面+doing还是+do? what are you doing? what are you doing what was he doing? What are you doing? What about our encounter是嘛意思啊? And what about you? what about ______ (swim)? what about the dog ? what about eating____food?