why do you don't know?语法哪里有问题?

why not 同义词是 why don't you 还是 why don't you do why don't you do=why not doing 为什么是 Why don,t you like koalas 不是 Why do you don,t like koalas? Do you understand?That don't you why say是什么意思 You don't kown me why do you join me? why don't you Why do you just don't understand me? why don't you do,还有其他句型吗?!?》《 why do you don't know?语法哪里有问题? why not后加do还是to do?why don‘t you 后面呢? Why not do sth.=Why don't you do sth.=什么? why not do sth.=why don't you do sth.还等于什么 why do you say like I don't understand why do you say like thiswhy do you say like this Do /don`t you think that.would you consider.why/ why not. why don't you?可以说缩写成why do not you 这两句英语语法正确吗 why don't you know either?why do you know too? why don't you still come 还是why do you still not come? why don't you cry why don't you cry