Unit 4 Natural Disasters Discovering Useful Structures 课件-2023-2024学年高中英语人教版（2019）必修第一册

Unit4 Discovering Useful Structure2 1 Lead in How much do you know about the Relative words of the attributive clauses? 定语从句的定义 我们先了解定语的概念 1. 定语从句起形容词的作用，在句中修饰一个名词或代词。 2. 定语从句分为限制性定语从句和非限制性定语从句。 3.被修饰的词叫先行词；引导定语从句的词叫关系词，包括关系代词和关系副词。 4.关系词的作用：连接主句或从句； 在从句中担当成分。 优秀课件，精彩无限！ 4 Harry Porter is a boy who has magic power. 先行词 关系词 定语从句 关系代词 关系副词 which, who, whom, whose, that where, when，why Learning aims: 1) To identify some special conditionsof the attributive clauses. 2）To use them freely in the exercises. Self-learning guidance 5') 1 ) Look at the following content in Task about the attributive clauses on PPT P94. 2 ) To find out the that and elements . 3 ) To finish the change-formed exercises in P95. 优秀课件，精彩无限！ 7 Harry Porter is a boy who has magic power. 先行词 关系词 定语从句 关系代词 关系副词 which, who, whom, whose, that where, when，why 1. 只用that不用which 的情况 [观察思考] 1.Is there anything that I can do for you? You can take any seat that is free. 2.This is the only book that can be useful to us. 3.It is the first composition that I have written in English. 4.This is the most interesting film that we have ever seen. 5.He told us the people and the places that he had visited. 6.Which is the book that you like best? PC (P) - (1)当先行词是不定代词everything, anything, nothing, all，none等时，或当先行词被every，any，all,few等词修饰时，关系代词一般用 that。 (2)当先行词被形容词最高级修饰时，关系代词一般用that。 (3)当先行词被序词修饰时，关系代词一般用 that。 (4)当先行词表示“正是的”，由the very,the only修饰时,关系代词一般用that。 (5)当先行词包括人与物时,关系代词一般用that。 (6)当先行词前面有 which等疑问代词时，关系代词一般用that。 Answers: 1.that 2.that 3.that Self-learning guidance( 5') 1 ) Look at the following content in Task about the attributive clauses on PPT P46. 2 ) To find out the who/whom and elements . 3 ) To finish the related exercises in P94. 2.只用which不用that 1.The pen with which he is writing was bought yesterday. 他正用来写字的笔是昨天买的。 2.That which you told him is exciting. 你告诉他的事是令人兴奋的。 （1）当关系代词前使用介词时，只用 which。 (2)先行词本身是that,或一个句子同时有两个定语从句,其中一个是由that引导时,另一个用 which,以免重复。 Answers: 1