定语从句: 在复合句 修饰并f限定名词或代词的从句。这 个名词或代词称为“先行词”，而引导定语从句的词称为“关系词”。定语从句置于先行词的后面。如，He is the man who/that wants to See you.他就是想见你的那个人 -， 在上名中,the man 是先行词, who/that 是关系词, who/that引导的定语从句修饰 he man。 一、关系词的选用与判断正确选择关系词是掌握定语从名的关键。关系词的选择取决于先行词和关系词在定语从句中所充当的句子成分。关系词 一共有九个，它们在从句中的用法如下表。 ， ”关系词在定语先行词|关过训二区合击训当的成分CJ 门 说明主语|宾语|表语|定语|状语 不能用于非人/物 | thag|VIVIVIx 限制性从句物 which|VIV|x X X 入| mvlvlvlxl xmaf芝FE宾语whom 人 whom| x|V|x X人/物 | whose| x | x|x1|VI|x 因亲 when | xjx|lx|lx|1V名词 |au 原因| why | xjx|x|lx|YV主要用于非限制性定语从句和 such.as，the same.as，as.as 结构中 人/物 | as He is the man whonythat I saw yesterday(whomythat 在从名中作宾语)Please pass me the book whose cover is green.(whose 在从句中作定语)The package which/that he was carrying wasmine.(whichythat 在从句中作宾语)We are facing the sm9 bm fasIwejdid years ago.(as 在从句中作宾语) ，There are occasions when one must yield.(when 在从句中4状语)Beijing is the place where I was borm.(where 在从句中作状 TT 语)Is this the reason why he refused our offer? (why 在从句中作状语) 二、限制性定语从句与非限制性定语从句1，限制性定语从名:从句与主句关系密切，去掉定语从句，主句意义不完整，甚至不合逻辑。四 was the only person in our office who was invited to the六 whb 可剧的定 可从全| 各下章思就不完整)2. 非限制性定语从句: EC 去掉定语从句，意思仍然完整。形式上用逗号与主句分隔开，不能用that 引导。Toms father，who is over Sixty，still works hard day andnight.(去掉 who 引导的非限制性定语从句，句子意思仍完整) 二、限制性定语从句与非限制性定语从句1，限制性定语从名:从句与主句关系密切，去掉定语从句，主句意义不完整，甚至不合逻辑。四 was the only person in our office who was invited to the六 whb 可剧的定 可从全| 各下章思就不完整)2. 非限制性定语从句: EC 去掉定语从句，意思仍然完整。形式上用逗号与主句分隔开，不能用that 引导。Toms father，who is over Sixty，still works hard day andnight.(去掉 who 引导的非限制性定语从句，句子意思仍完整) 2) which 而不 that 的情况: 四引导非限制性定语从句。 代表整个主名图介词十关系代词。He had 侠ff 记 全 maths， exam 融和 made his father veryangry.This is the room in which my father lived last year. 扩意思。 2. as 引导定语从句时的用法Das 引导限制性定语从句通常用于 the same as, suchas 结构中。Such machines as are used in our workshop are made inChina.我们车间使用的这种机器是中国制造的。2)as 引导非限制性定语从匈取可 j放在主条之前，也可放在主句之后，用来补充说明整个句子。通常用于下列句型as is known to all 众所周知as is said above ”综上所述as is reported in the newspaper ”正如报纸所报道的as is announced ”正如宣布的那样as we all know ”正如我们所知 as Texpect 正如我预料的那样as everybody knows “正如大家所知as we can see “正如我们所看到的那样as have said ”正如我所说的那样as is often the case 通常如此，as might have been expected 乐遇所料as is mentioned above ”正如上面提到的As I expected, he got the first place again in this mid-termexamination .