定语从句的省略主语
关系代词在定语从句中除作宾语可以省略外，在下列情况下，作主语也可以省略。
1.定语从句中含there be，作定语从句主语的关系代词可以省略。
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。
2.主句以there be开始，作定语从句主语的关系代词可以省略。
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。
3.主句以that is/was开始的句子中，作定语从句主语的关系代词可以省略。
That's all is today's homework.
今天的'家庭作业就是这些。(all后省去that)
Was that someone posted your letter?
是有人帮你把信寄走了吗?(someone后省去that)
4.主句以here is，here are开始，作定语从句主语的关系代词可以省略。
Here is the professor comes from the Oxford University.
这是从牛津大学来的一位教授。(professor后省去who)
Here are three or four of us got a full mark in the examination.
我们这里三四个人考试得了满分。(us后省去who)
5.主语以have(意思是“有”)作谓语，作定语从句主语的关系代词可以省略。如：
I have two more people should come to help me.
我还有两个人应该来帮助我。(people后省去who)
We have words to speak to those people will be put to do the work.
我还有话要对派去做这工作的人说。(people后省去who)
英语关系代词作定语从句主语省略的情况常见之于口语和非正式英语，对我们作为非本族语言的人来说应该慎用。但是了解这种省略情况是完全必要的，因为这会有助于我们识别和理解这种语言现象，提高我们的英语阅读能力和欣赏水平。
