what do you say to doing sth

what do you say to doing sth what you can do is...后面是to do sth还是do sth?另外doing sth行吗 what do you mean by doing sth? what about doing sth还是what about to do sth would you like doing sth.还是to do sth. what do you want to say? what do you want to say What do you say to your friends? DO not remember What you say to what are you doing to do there? what about doing sth和what about to do sth 有什么区别? “What about to do sth.”和“What about doing sth.”哪个是正确的?