5.关系代词作主语的一致问题

(1)关系代词who，which，that，but和as在定语从句中作主语时，从句谓语动词的人称和数要和先行项保持一致。

I，who am the foreman，have the right to decide when to knock off．

我有权决定什么时候收工，因为我是工头。

在此句中，定语从句的先行项是I，所以关系代词who在数上要与先行项保持一致。

Such questions as are asked by students are hard to answer．

学生提出的这类问题很难回答。

There are as many tools as are needed．

凡是需要的工具都有了。

There are few of us but admire your determinations．

我们中间很少有人不钦佩你的决心。

(2)在“one of+复数名词”结构后面的定语从句一般用复数。

Vietnam is one of the countries that are becoming popular with many Chinese tourists．(人教大纲版高二下第113页)

越南是中国游客越来越喜欢的国家之一。

提示：

但当one前有the only，the very，just the修饰时，先行项为one。

He is the only one of the students who was here just now．

(3)如果先行项是一个集体名词，当它被视为一个整体时，引导定语从句的关系代词用which，谓语动词用单数形式;当它被视为许多个体时，引导定语从句的关系代词用who，谓语动词用复数形式。

He joined the party which was in power．

他加入了执政党。

He joined the party who were walking before him．

他加入了在他前面走的一伙人中。

提示：

在多重定语从句中，我们要认清定语从句的限定对象，否则就会出现定语从句的人称和数不一致的现象。

I am the infamous creature you have heard of that lives among the thieves．

我就是你们曾听说过的那个声名狼藉、跟盗贼为伍的人。在此句中，that lives among the thieves是修饰the infamous creature的，被you have heard of隔开后，容易判断错误。