How about going going swimming对吗

How about going going swimming对吗
How about going going swimming对吗

How about going going swimming对吗
应该是 How about going swimming?

不对

How about go to swim才对。

How about是一个建议表达法，后面要接doing形式，所以应该是How about going swimming?
在这里go swimming是一个固定的词组，是购物的意思，只不过go用在这个建议表达法中得变型。