Unit 1 People of AchievementSection Ⅱ Learning About Language非限制性定语从句 考点一 非限制性定语从句的引导词 1．关系代词的选择(1)非限制性定语从句不能用关系代词 that 引导。指人时，如果引导词在从句中作主语，要用 who，作宾语要用 whom/who；指物时要用 which/as。在句中，即使引导词作的是宾语也不能省略。Mr Zhang, who came to see me yesterday, is an old friend of my father's.张先生昨天来看我，他是我父亲的一位老朋友。(作主语)Peter, whom you met in London, is now back in Paris.彼得现在回巴黎了，你在伦敦见过他。(作宾语，不能省略)(2)as 和 which 的选择1)as 引导的非限制性定语从句① 位置灵活，可置于句首、句中和句末② 先行词不可是一个词，通常是整个主句③as 有“正如，就像”的意思，表示依据、评论、态度、看法等④ 常用于以下动词的主、被动语态：know， say， expect， suggest， report 等She has been late again, as was expected.她又迟到了，这是预料之中的事。(位于句末)As we had expected, Tom passed the driving test.正如我们预料的那样，汤姆通过了驾照考试。(位于句首)Global warming, as we all know, has caused a lot of natural disasters.众所周知，温室效应已经引发了很多自然灾害。(位于句中)2)which 引导的非限制性定语从句These apple trees, which I planted three years ago, have not produced any fruits.这些苹果树是我三年前栽的，还没有结过果实。(which 指代 these apple trees)Tom passed the driving test, which made his parents very happy.汤姆通过了驾照考试，这使他的父母很高兴。(which 指代整个主句)He said that he had never seen her before, which was not true.他说他以前从没见过她，这不是真的。(which 指代主句中的宾语从句)2．关系副词的选择在非限制性定语从句中，关系副词(when, where, why)的选择方法和在限制性定语从句中的一样，即引导词在从句中作时间状语时用 when，作地点状语时用 where，作原因状语时用 why。The story in the book happened in Canada, where Doctor Bethune was born.书中的故事发生在加拿大，白求恩大夫就是在那里出生的。I left on Sunday, when everyone was ...
