pvc u双壁波纹管连接:Why isn't you ?

Why isn't you ? why don't you......造句 Why didn't you中文意思 Dr:Mrs Hunter ...and Kelly,isn't it?为什么这里用的是"isn't it"而不是"aren't you" Isn't you friend like animals?哪个地方错了 You was stady my variant of contract, isn't it?是什么意思啊？ There isn,t()water here. Could you get ()for me why don't you cooperate with me？ 有谁知道why don't you 是什么意思？ why don't you try chewing gum instead?