there be 定语从句中,关系代词作主语,关系代词可省略的情况能不能给我举几个例子?

You must make a list of the names of the students there are in your class．你必须列一张你班同学的名单。He showed me the difference there is between what is right and what is wrong．他给我指出了对和错的不同之处。There is something keeps worrying me．有些事一直使我担心。There is a teacher here can speak Spanish．这里有一位老师能说西班牙语。