what about reading aloud to practice pronunciation?为什么用reading?不用read

what about 意思为“做什么事情如何，怎么样？”
about 为介词，介词后面接动词的话，只能用动词ing形式。
类似的用法还有look forward to doing sth.来自：求助得到的回答

what about后面接动词ing,因为about是介词

貌似是what about doing sth的句型，
about后不能直接接动词原型吧

about是介词，后跟名词