新人教版高中英语必修2Unit 1 Cultural Heritage-Discovering Useful Structure教案二（内容丰富）

Step 6 Special casesA. 关系词只能用that而不用which的情况 1．当先行词为all, everything, nothing, anything, much等不定代词时。Have you taken down everything that Mr Li said?All that can be done has been done.2．先行词被序数词或形容词最高级修饰时。The first place that they visited in London was the Big Ben.This is the most delicious food that I have ever had.3．先行词被all, every, no, the only, the very, the last等修饰时。I've read all the books that are not mine.The only thing that she could do was to go to the police for help.I have found the very pen that I lost yesterday.4．当先行词既指人，又指物时。 He made a speech on the men and things that he had seen abroad.B. “介词＋关系代词”引导的定语从句当关系代词在定语从句中作介词的宾语时，我们通常用“介词＋关系代词”引导定语从句。如果指“人”，用“介词＋whom”；如果指“物”，用“介词＋which”；关系代词有时也用whose(作定语)。选用介词的依据：1．根据定语从句中谓语动词的搭配习惯(即固定短语)。Yesterday we visited the West Lake for which Hangzhou is famous.(be famous for“因……而出名”)2．根据先行词的搭配习惯(约定俗成，不一定是短语)。This is the camera with which he often takes photos.(with camera“用照相机”)The boss in whose company Mr King worked heard about the accident.(in the boss' company)