why not 后跟do 还是doing?

why not do还是why not doing? why not +doing还是do Why not 后面+doing 还是to do? why not to do 还是why not doing why not doing sth还是why not do sth还是why not to do sth why not后加do还是doing还是to do? warn sb后跟to do 还是doing stand后跟to do还是doing? dedicate to后跟doing 还是do? to后跟doing还是do如何判断? love sb后跟to do 还是doing 介词后跟to do 还是doing?