Unit 9 知识点 2022-2023学年人教版九年级英语全册

Unit 9 I like music that I can dance to? 【单元重点语法：关系代词引导的定语从句】 1. 修饰名词或代词的从句叫定语从句。 被修饰的名词或代词叫先行词。 引导的定语从句的关系代词有that, which, who(宾格whom, 所有格whose) 关系代词的作用：a. 代替先行词 b. 在从句中担任成分：主语、宾语(做宾语时可省)、定语等。 关系代词在定语从句中做主语时，谓语动词的单复数应与先行词保持一致。 c. 把主句和从句连接起来 先行词 关系代词 先行词 关系副词 指人 that (作主语、宾语或表语) who (作主语、宾语或表语) whom (作宾语) whose(作定语) = of whom 指物 that (作主语、宾语或表语) which (作主语、宾语) whose(作定语) = of which 注意：定语从句谓语动词的单、复数取决于先行词。先行词是单数时，从句的谓语动词用单数； 先行词是复数时，从句的谓语动词用复数。 Mr Smith, who is now downstairs, is asking to see you. The Smiths, who are now downstairs, are asking to see you. 例： Is he the man who/that wants to see you?（先行词指人，在从句中作主语，） He is the man (who/whom/ that) I saw yesterday.（先行词指人，在从句中作宾语,关系代词可省略） The photo (which/that) we liked best was taken by Tom. 先行词指物,在从句中作宾语,关系代词可省 Please pass me the book whose cover is green.（先行词指物，在句中作定语--- the book’s cover is green。） 2. 定语从句关系代词只能用that, 不能用which/who 的情况： 1）先行词即有人又有物时，只用that We are talking about the piano and the pianist that were in the concert. 2）先行词为指物的不定代词或被不定代词修饰时： everything, nothing, something, anything, one, none, all, any, every, no, few, little, much 等 I am sure there is something (that) you can borrow. 3) 先行词是序数词或最高级或被序数词或最高级修饰时。 This is the best movie (that) I have seen. He is the first student that got to school. 4) 先行词被the only, the very, the same, the last修饰时。 This is the very book that belongs to him. 5) 主句中本身有who/which时,为了避免重复, 关系代词只用that Which of the books (that) you borrowed from the library is the most interesting? 3. 定语从句关系代词不能用that的情况： 1) 关系代词前有介词时, 只能用which(指物)，whom（指人），且不能省略。 I love the school (which/that) I have studied in for three years. --- I love the school in which I have studied for three years. 2）先行词本身是that, those 时, 关系代词不用that 3）引导非限制性定语从句时，关系代词不用that 4、限制性定语从句和非限制性定语从句 根据定语从句与先行词的关系，定语从句可分为限制性定语从句和非限制性定语从句。 限制性定语从句紧跟先行词，主句与从句不用逗号分开，从句不可省去； 非限制性定语 从句主句与从句之间有逗号分开，起补充说明作用，如省去，意思仍完整。 1、限制性定语从句举例： The teach