谢和弦i dont know why

谢和弦i dont know why why?I dont know! I dont know why do you do it.正确吗 I dont know why he was late for school again. 英文歌I DONT KNOW WHY YAYA THE DREAM . I DONT KNOW WHY YOU WERE LATE FOR SCHOOL AGAIN i dont know her i dont know f I dont know why he was late.这个句子里为什么用why不用that? when i tear i.dont know why i did not come baby i dont know why i so like u这句话什么意思? today i see my boss son,i dont know why my tears can not con