a such thing对吗?

a such thing对吗? she said I had been fool to do such a thing!这句话对吗? such a thing was unheard We _____do such a thing. i don't know why did she do such a thing这句话的语法对吗,为什么 such a thing,为什么thing前面要加个a吖? Such A Little Thing Makes Such A Big Difference 歌词 such a crazy thing 中文是什么意思? Love Is Such A Crazy Thing 歌词 did ( ) ever hear of such a thing ? You did such a bad thing.We_______you. Points on such a big thing