必修5Unit 1 Great Scientists 语法课.docVIP

必修5Unit 1 Great Scientists 语法课 济宁市第一中学 林翠菊 李雯 张学敏 刘玉东 邵长云 孔庆民 第一步 作业检查 1. Check their homework and remind them of what they learnt in the last period. 2. 让学生相互交换所写的小文章，注意语言的准确性，选出本组最佳文章、好的语句，课后老师收集、整理，进行张贴，大家共享、共赏。 第二步 查找探究 1. Ask students some knowledge about the past participle. 2. Get students to find out the sentences with the past participles from the reading passage. ① Doctor John Snow was a well-known doctor in London... ② So many thousands of terrified people died every time there was an outbreak. ③ John Snow told the astonished people in Broad Street to remove... ④ But he became inspired when he thought about helping ordinary people. ⑤ Neither its cause , nor its cure was understood. ⑥ He got interested in two theories. 3. Let students work in pairs to translate these sentences, trying to understand the usage of the past participles. 第三步 理解归纳 Page 4 Discovering useful structures Exercises 1, 2 3. 1. Ask students to finish the exercises of how the past participles are used. 2. Students draw a conclusion of the usages given here in groups or four. 3. Teachers give necessary explanation and some more general usages of the past participles. 过去分词是非谓语动词的一种形式,表示完成和被动的动作。它在句子中可以充当表语、定语等成份。下面仅谈其作定语和表语的用法。 一、过去分词作定语 过去分词作定语有前置和后置两种情况。 1、前置定语 单个的过去分词作定语,通常放在被修饰的名词之前,表示被动和完成意义。 A类:被动意义: an honored guest 一位受尊敬的客人 The injured workers are now being taken good care of in the hospital. 受伤的工人现正在医院受到良好的照料。 B类:完成意义: a retired teacher 一位退休的教师 They are cleaning the fallen leaves in the yard. 他们正在打扫院子里的落叶。 2、后置定语 过去分词短语作定语时,通常放在被修饰的名词之后,它的作用相当于一个定语从句。如: This will be the best novel of its kind ever written . 这将是这类小说中写得最好的。 Who were the guests invited to your party last night? 昨晚被邀请参加你的晚会的那些客人是谁呀? 二、作表语 过去分词作表语并无“完成”或“被动”之意，而是表示主语的状态或思想感情等。例如： He looked worried after reading the letter. 看完信后，他显得很忧虑。 When we heard of the story, we were deeply moved. 当我们听到这个故事时，被深深地感动了。 He seemed quite delighted at the idea. 听到这个想法，他似乎很高兴。 常见的作表语的过去分词有： am