there is和there have有什么区别?
问题描述：
there is和there have有什么区别?
答
there is 和there have been得区别就如同 sb do 和 sb have done.there is 表示当前有的状态；there have been 表示到目前为止有的状态.there is a man,现在有一个男人；there have been some boys,从过去某段时间到...