Why couidn't Benben win the first

Why couidn't Benben win the first Why could't Benben win the first prize? 谁有南通市2009届高三第一次调研测试英语答案why couidn't the man get through to the woman He was so busy that he couidn't go to the concert[改为同义句] The birds couidn't fly in the sky.（改为同义句）The birds---fly in the sky.中间三个横线 why not,why didn't,why couldn't的区别 why didn't why don't you Why don't you+...why not +. why don't和why not why don't we =why not 还是why don't you=why not why don't you cry why don't you cry Don'T Ask Why 歌词 Why she doesn't love Why Didn'T You 歌词 Why don't you 造句 why don't 的用法 Why don't you 歌词