U2 Discovering useful structures 非谓语之现在分词作状语 配套学案-2022-2023高中英语同步备课堂（人教版2019）（必修第三册）

非谓语之现在分词作状语 Teaching aims: 1. 现在分词做状语与过去分词作状语的区别 2. 现在分词的完成时态的用法 3. 独立主格结构与分词作状语区别 Difficult points: 1.现在分词的完成时态; 2.独立主格结构 Lead-in 非谓语动词之分词 1.动词分为谓语动词和非谓语动词，当一个简单句或从句中已经出现了一个谓语动词或系动词，那么第二个动词要变成非谓语形式（V-ed/V-ing/ to do） 2.动词的非谓语可做除谓语之外的任何成分，如定语，宾语，表语，宾补，状语，主语等。 3. 非谓语中分词形式的选择要先找其逻辑主语，在判断其逻辑主语与非谓语间的关系，现在分词主动或进行，过去分词被动或完成。 Presentation 非谓语动词作状语可表时间、原因、条件、让步、结果、方式或伴随。 1、 状语从句或并列结构的转换 非谓语动词作状语可表时间、原因、条件、让步、结果、方式或伴随。可转换为相应状语从句或and引导的并列结构 1.时间：可转换为由“when, while, until引导的时间状语从句 Walking in the park, she saw an old friend. ＝When she was walking in the park, she saw an old friend. ＝When walking in the park, she saw an old friend. 2.原因：可转换为由since, because或as引导的原因状语从句 Being ill，he couldn't go to school. ＝As he was ill，he couldn't go to school. 3.条件：可转换为由if, once或unless引导的条件状语从句 Working hard，you'll make great progress. ＝If you work hard，you'll make great progress. 4.让步：可转换为由though/although引导的让步状语从句 Knowing it is difficult, I don’t give up. ＝Although I know it is difficult, I don’t give up. 5.方式或伴随或结果：可转换为and引导的并列结构 Tom sat by the window, reading a book.（V-ing做伴随状语）=Tom sat by the window and was reading a book. His parents died，leaving him an orphan.（V-ing做结果状语）＝His parents died and left him an orphan. Please answer the question ，using another way.（V-ing做方式状语）＝Please answer the question and use another way. 注意1：分词选择要先找逻辑主语(逻辑主语与句子的主语一致)，再判断主被动。现在分词主动或进行，过去分词被动或完成。 1.Walking in the park, she saw an old friend. 2.Hearing the news, he got frightened.  3.Done in a hurry, his homework was full of mistakes. 4.Given more time, we will do better. 注意2：一般情况下，过去分词和逻辑主语是被动的关系，但某些过去分词的固定搭配不表被动，表主语的状态或主观心理感受lost in (沉迷); seated (坐); born (出生于); dressed in (穿着)；interested in(感兴趣)； tired of 1.Born on 2 January 1970, He began studying music at the University. 2.Moved by Mozart’s music, he said, “It was like seeing color for the first time.” 2、 doing 的完成时态 having done分词表示的动作比句子的谓语动词先发生,句子主语与having done的关系依然是主动关系。 1. Having finished his homework, he rushed out to play basketball. 2.Having stu