新人教选修七 Unit 4 Sharing定语从句复习课件.ppt

2. 宜用which引导的定语从句 当定语从句的介词提前时，要用which。 The house in which they lived last year has been rebuilt. 引导非限制性定语从句时，要用which。 He bought a railway ticket for the woman, which helped her a lot. * * 定语从句复习 定语从句 　　定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。　　关系代词有：who, whom, whose, that, which等。　　关系副词有： when, where, why等。 when where 关系副词 whose whom who that which 关系代词 宾 主 宾 主 时间状语 地点状语 定语 先行词是人 先行词是物 注：1.介词提前时一般只用which和whom。 2.whose+名词=the+名词+of which/ of whom This is the detective who came from London. The book which I am reading is written by Tomas Hardy. The desk whose leg is broken is very old. This is the room that Shakespeare was born in. (1) 如果先行词是all, much, anything, something, nothing, everything, little, none等不定代词，关系代词一般只用that，不用which。例如： All the people that are present burst into tears. (2) 先行词有两个，既有人也有物，要用that。 We were talking about the persons and things that we remembered in our school. 关系代词that 和which的区别  1.宜用that引导的定语从句 (3) 如果先行词被形容词最高级以及first, last, any, only, few, mush, no, some, very等词修饰，关系代词常用that, 不用which, who，或whom。例如： This is the most impressive TV theater that has never been put on show before . 这是以前从未上演过的最有感染力的电视剧。That is the only way that leads to your success .那是通向你成功的唯一之路。We have to consider the first thing that starts our work .我们必须要考虑启动我们工作的第一件事。 as, which 非限定性定语从句 由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。 As we know, smoking is harmful to ones health.The sun heats the earth, which is very important to us.　　 Alice received an invitation from her boss, ___came as a surprise.A. it　 B. that　 C. which　　D. heIt rained hard yesterday, ____ prevented me from going to the park..A. that　B. which　　C. as　 D. it 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，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：　(1) as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思　(2）as 代表前面的整个主句并在从句中作主语时