Unit 7 The Sea语法·剖析关系副词引导的定语从句;引导词前有介词的定语从句1.观察下列句子:The place where I went last summer is the Mountain Tai.我去去的地方是泰山。 I remember the days when I stayed in Thailand.我还记得在泰国的那些日子。The reason why Jack is so happy is that he passed the exam.杰克之所以那么高兴是因为他通过了考试。我们已经学习了用关系代词 that,which,who/whom 引导的定语从句。回忆一下规则,我们可以判断,以上的三个句子不可以用这几个关系代词引导。因为,关系代词要在定语从句中充当主语或宾语,而这几个句子中,定语从句部分均不缺这两种成分,所以,应该使用关系副词 where,when 和 why。显然,where 的先行词应该是表示地点的名词或代词,when 的先行词是表示时间的名词或代词;而 why 的先行词应该是表示原因的名词 reason。2.我们对上面的三个句子作些改变:The place to which I went last summer is the Mountain Tai.I remember the days in which I stayed in Thailand.The reason for which Jack is so happy is that he passed the exam.可以看出,上面的三个句子都需要代词来引导,并作介词的宾语。所以,我们要用关系代词 which 或 that。但是,that 是不能跟在介词之后引导定语从句的。因此,这三个句子都用 which 来作引导词。3.介词放在关系代词之前的注意事项:(1)有的介词是定语从句中词组的固定搭配拆开的结果,即用什么介词由从句中的动词决定。如:He is the boy who/whom I was talking to.他是我刚才与之交谈的男孩。→He is the boy to whom I was talking.(2)有的介词是根据句意添加上去的,即用什么介词由先行词决定。如:This is the subject on which he made great progress.这就是他取得巨大进步的科目。He employed 30 men,of whom 12 were from his hometown.他雇了 30 个人,其中有 12 个是他的老乡。(3)定语从句中的词组若是十分密切的固定搭配,一般不可拆开。如:Is this the pen that/which you are looking for?这是你在找的那枝笔吗?The baby who/whom my sister takes care of is so lovely.我姐姐照顾的那个婴儿是如此的可爱。(4)表时间的“介词+which”=when;表地...