why not to do 还是why not doing

why not do还是why not to do why not sb +do还是to do why not to do 还是why not doing 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 后面+doing 还是to do? why not后加do还是doing还是to do? why not do还是why not to do?都把我弄蒙了 是Why not to do sth还是Why not do sth? 那个语法是why not to do Sth还是why not do Sth why not +doing还是do why not后加do还是to do?why don‘t you 后面呢? 是why bot do sth.还是why not to do sth. why not 是加to do sth. 还是 动词原形 why not后面是doing sth还是 to do sth 是why not do sth.还是why not doing sth. Do you like to travel Why or why not Do you want to be famous?Why or why not?