why not do等于什么

why not do等于什么 why not等于什么 why not do sth.=why don't you do sth.还等于什么 why not +什么 doing?do? why do not和why not有什么不同? Why not do 和 Why don't do 什么区别 why not等于why()() why do not do sth与why not do sth有什么区别? Why not come with us等于什么 Why not like science?是否等于Why do not you like science? why not do和why not to do有什么区别?要尽快! Why do you like 等于什么句型?