There在现在完成时中是There have还是has

There在现在完成时中是There have还是has 完成时用在there be句型中怎么用?是has还是have? 在现在完成时中 have(has)+动词过去分词 ,如果主语是不可数名词 后面是用have 还是has? 用现在完成时,there have been 和 there has been造句,各造5个 是"there has changed a lot"还是"there have changed a lot"?”为什么 是There have been 2 pictures on the wall.还是There has been 2 p 是"there has changed a lot"还是"there have changed a lot"? 饭裏面有牛油.英文是 there has butter in the rice 还是 there have butter 用英语说这里有是there has还是there have.there is也可以是这里有么? 英语句子中加have/has是一般完成时还是现在完成时? 在横线上填上“have,has”或 “there is , there are” . 在现在完成时中,has和have在什么时候用.