why not do it

why not do it Why I can not do it why not i can do it why not just do it?正确么? if it is not fun why do it why not do sth why not +do sth Why do not want why not do句子 why not do还是why not doing? It is not that I do not like plays.The reason why I did not do you think it is good to be famous?why or why not?