Unit 5 第3课时 Discovering Useful Structures-【南方凤凰台·5A新学案】2023-2024学年新教材高中英语必修第一册人教版2019（讲1本课件）

Unit 5 Languages around the World 第3课时 Discovering Useful Structures ——限制性定语从句(2) 必修第一册 　南方凤凰台　5A新学案 · 英语 RJ 1 语 法 图 解 南方凤凰台·5A导学案·英语 语法感知 ① That was a time when the Chinese people were divided geographically. ② Emperor Qinshihuang untied the seven major states into one unified country where the Chinese writing system began to develop in one direction. ③ There are many reasons why this has been possible, but one of the main factors has been the Chinese writing system. ④ These were animal bones and shells on which symbols were carved by ancient Chinese people. ⑤ It was in 1952 and Mandela was the black lawyer to whom I went for advice. 1. 关系副词__________在定语从句中作时间状语(如句①)；关系副词__________在定语从句中作地点状语(如句②)；关系副词__________在定语从句中作原因状语(如句③)。 2. 在“介词＋which/whom”引导的定语从句中，____________用于指代物(如句④); __________用于指代人(如句⑤)。 when where why which whom 精讲精练 Ⅰ. 关系副词引导的定语从句 关系副词 基本用法 例句 when 引导定语从句时，先行词为表示时间的名词，关系词在从句中作时间状语 I will never forget the semester when (＝during/in which) I majored in English. why 引导定语从句时，先行词通常是reason, 关系词在从句中作原因状语 I didn’t know the reason why(＝for which) he demanded that we should do such a foolish thing. where 引导定语从句时，先行词为表示地点的名词，关系词在从句中作地点状语 Last summer holiday, I visited Denmark where (＝in which)I learned some dialects. 精讲精练 ① where还可以用在situation, stage, point, case, position, condition等表示抽象意义的地点名词后引导定语从句，在从句中作状语。 ② 先行词是the reason时，定语从句的引导词要根据定语从句缺少的成分而定，如果缺少状语则用关系副词why；如果缺少主语或宾语，则用关系代词that/which，作宾语时可省略关系代词。 精讲精练 ① They have reached the point where they have to say goodbye. 他们已经到了不得不说再见的地步。 ② The reason why he has enlarged his vocabulary is that he reads English novels every day. 他扩大词汇量的原因是他每天都读英语小说。 ③ The reason (that/which) he gave us at the meeting made no sense. 他在会上给我们的理由毫无意义。 精讲精练 Ⅱ. “介词＋which/whom”引导的定语从句 基本用法 “介词＋关系代词”引导定语从句时，关系代词只能用which(指物) 或whom(指人)，而且which和whom不能省略 I don’t know the Danish with whom you talked just now. 在“复杂介词＋关系代词”引导定语从句时，常用复杂介词有as a result of, at the back of, because of, by means of, in front of等 We got to a house at the bac