2.关系代词作宾语时的省略

关系代词which，whom，who，that在定语从句中作宾语时可以省略。

Here is the man(which/that)you're been looking for．

这就是你在找的人。

It is an experience(which/that)I shall never forget and shall value for the rest of my life．(人教大纲版高一下第32页)

这段经历令我终生难忘，珍惜一生。

Heat capacity is the amount of energy(that)it takes to raise the temperature of a substance by one degree centigrade．(人教大纲版高二下第20页)

热容量是一种物质升高一摄氏度所需要的能量。

提示：

以下情况作宾语不能省略:

①在“介词+whom”与“介词+which”中，whom，which不能省略。

Do you know any shops nearby in which I can buy flowers?

That is the headmaster with whom my father was talking just now．

②在非限制性定语从句中，作宾语的关系代词也不能省略。

Mr．Green，whom you know，is the tallest in our school．

The elephant is like a spear，as anybody can see．

③在the same．．as，such．．as，as．．as，the same．．that中，as，that即使作宾语，也不能省略。

I have bought the same bicycle as you have(bought)．(指同类用as)

This is the same book that I read the day before yesterday．(that指同一个)④当由and，but，or等连词连接两个或两个以上的定语从句修饰一个先行项时，第一个关系代词可省略，但第二个、第三个不可省略。

This is the book(which)I read yesterday and which I find very interesting．