UNIT 5 Section Ⅲ Using language—Grammar（Word教参）-【优化指导】2023-2024学年新教材高中英语必修第一册（外研版2019）

Section Ⅲ　Using language—Grammar 定语从句(2) [对应学生用书P138] [观察] 1．Somehow they manage to travel around 4，000 kilometres south and find their way to places where they will spend the winter. 2．(教材P51)The solution to the mystery of the monarch's amazing ability comes at a time when it is in serious trouble. 3．Unfortunately, human activity is the main reason why the monarch numbers are falling. 4．(教材P51)In many of the places where the butterfly can be found, people are destroying the natural environment. 5．If this work is successful, there may come a time when monarch numbers increase once again. 6．This is the reason why the word “belated” was invented. [归纳] 1．句1、句4中定语从句的引导词是关系副词，在定语从句中充当地点状语，定语从句修饰表示地点的名词places。 2．句2、句5中定语从句的引导词是关系副词，在定语从句中充当时间状语，定语从句修饰表示时间的名词time。 3．句3、句6中定语从句的引导词是关系副词，在定语从句中充当原因状语，定语从句修饰表示原因的名词reason。 [对应学生用书P138] 一、定语从句中关系副词的功能、关系词的判断 定语从句 关系副词的功能 when作时间状语 where作地点状语 why作原因状语 关系词的判断 作主语或宾语：关系代词 作状语：关系副词 1．when引导的定语从句 when 指时间，在定语从句中作时间状语。先行词通常是time, day, week, year等。 Here came the day when they took the final interview. 到了他们参加最终面试的那一天了。 I still remember the time when I first travelled by plane. 我仍然记得第一次坐飞机旅行的时候。 We will never forget the year when the 29th Olympic Games were held in Beijing. 我们将永远不会忘记第29届奥林匹克运动会在北京举办的那一年。 2．where引导的定语从句 where 指地点，在定语从句中作地点状语。先行词通常是place，street，house，city，country以及一些抽象意义的名词，如point, case, position, condition, situation等。 This is the house where they lived a week ago. 这是一个星期前他们住过的房子。 Finally, we got to a factory, where many mobile phones of high quality were produced. 最后，我们来到了一家生产很多高质量手机的工厂。 I got to the point where I couldn't wait to get home to read my books. 我迫不及待地想回家读书。 This is the situation where this word often appears. 这就是这个单词经常出现的情况。 3．why引导的定语从句 why指原因或理由，在从句中作原因状语。先行词通常是reason。 The reason why I don't trust him is that he often tells lies. 我不信任他的原因是他经常撒谎。 Can you explain the reason why you don't help him? 你能解释一下你不帮助他的原因吗？ We all want to know the reason why you left without a word. 我们都想知道