Unit 1 语法非限定性定语从句课件-2022-2023学年高中英语人教版（2019）选择性必修第一册

1 Attributive Clauses 定语从句 学习目标 1、认识并区分限制性定语从句和非限制性定语从句。 2、掌握 as 引导定语从句的用法。 3、掌握which 和 as 引导定语从句的区别 2 3 定义: 用来修饰——或——的从句叫定语从句。被定语从句所修饰的名词或代词叫——（antecedent）。定语从句一般是由————或————来引导的。 分类： 定语从句分为＿＿＿＿＿＿＿ 和 ＿＿＿＿＿＿＿___。 限制性定语从句 非限制性定语从句 概念 代词 名词 关系代词 关系副词 先行词 1. Beijing is a city which i have always wanted to visit. 2.Beijing ,which is the capital of China, has a very long history. 限制性定语从句和非限制性定语从句 1．限制性定语从句是先行词在意义上不可缺少的定语，如果去掉，主句的意思就不完整或失去意义。这种从句和主句的关系十分密切，写时不用逗号分开。限制性定语从句中作宾语的关系代词常可省略。 2．非限制性定语从句和主句关系不十分密切，只是对先行词作些附加的说明, 如果去掉, 主句的意思仍然清楚。这种从句和主句之间往往用逗号分开，不用that引导。非限制性定语从句中，关系词不可省略。 3.大多数限制性和非限制性定语从句的先行词往往为某一个词或短语，而特殊场合非限制性定语从句的先行词也可为整个主句，此时非限制性定语从句常由which引导。 eg. A middle-aged woman killed her husband, which frightened me very much. 一个中年女子杀害了其丈夫，这事令我十分恐惧。 　　 1.You should go to see Mary, who has been ill for a long time. 2. Last night i saw a very good film, which is about the Second World War. 3. My brother, whom you saw just now, is an engineer. 4. The building, whose roof we can see from here, is a church. 5. He is leaving for Beijng, where he will attend a meeting. 6. As is often the case, we have woked out the production plan. 非限制性定语从句 引导非限制性定语从句的关系代词有；which; who; whom; whose; as关系副词只有where，as非限制性定语从句一般用逗号与主句隔开。 As 引导定语从句 一.引导限定性定语从句 在定语从句中构成same…as..; such…as…的结构，在从句中作主语，宾语，表语或状语。 Eg: 1.I like the same book as you do. 2. Such studets as you have mentioned should be criticized. 3. Pollution is such a big problem as concerns the whole mankind. 二、引导非限定性定语从句 Eg. 1. As is known to all, he is the best student in our class. 2. As we all know, he studies very hard. 3. As is often the case, we have worked out the production plan. 总结: as 在非限定性定语从句中用来说明整个主句，放在主句之前。在定语从句中作主语或宾语。 11 as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，不同之处主要有： ① ____引导的定语从句可置于_______，而which不可。 ② as代表前面的整个主句并在从句中作主语时，常可 翻译为“______________”, 而which常译为 “____________________” ③ 在限制性定语从句中，如果先行词被as, so , the same, such 修饰时，关系代词常用______。 which 和 as的区别 句首 As 正如，正