unit 4.单元语法课件（分词做状语用法）-【帮课堂】2021-2022学年高一英语同步精品讲义（上外版必修二）

Unit 4 Sports 必修二 上外版 2022 CONTENT 现在分词做状语 过去分词做状语 现在分词做状语 构 成 形 式   主动形式 被动形式 一般式 doing being done 完成式 having done having been done 现在分词： 现在分词的否定式 not/never having done not/never doing not/never being done not/never having been done 现在作状语： 一、 表示伴随情况，如： The children ran out of the room, laughing and talking merrily. = while they were laughing and talking… She sat at the desk reading a newspaper. = while she was reading… 二、表示原因或理由： Seeing nobody at home, she decided to leave them a note. Not knowing her address, we couldn’t get in touch with her. = As she saw…… Because we didn’t know… 注：如果分词的动作在谓语动作之前发生，则要用完成形式，如： Having finished his homework, Tom went home. =After//Because he had finished… Not having received an answer, he decided to write another letter. =Because he had not received… 三、作时间状语（相当于 when 引导的从句）： Hearing the news, they all jumped with joy. = When they heard… Seeing those pictures, he couldn’t help thinking of those days in Beijing. When he saw… 注①：如果两个动作同时发生的，多用 when 或 while + 分词这种结构，如： Be careful when crossing the street. Don’t mention this while talking to him. you are you are 注②：如果要强调谓语动词的动作发生时，分词的动作已经完成，要用完成形式： Having heard the result, the spokeswoman expressed her opinion After she had heard 四、现在分词作状语还可以表示结果、条件和让步，如： The bus was held up by snowstorm, thus causing the delay. = thus it caused … Working hard, you will succeed. Weighing almost 100Kg, the stone was moved by him alone. If you work hard Although it weighed… 状语从句的省略： 1.状语从句中如果从句的主语与主句的主语相同，且从句谓语中含有be动词的某种形式，则将从句引导词和从句主语以及be动词一起省去。 2.状语从句中如果从句的主语与主句的主语相同，但从句谓语中不含有be动词的某种形式，则将从句引导词和从句主语一起省去，谓语部分第一个改为-ing 形式。 Hearing their teacher's voice, the pupils stopped talking at once. Don't be careless when /while having an exam. When they heard… When you are… Having finished his homework the boy was allowed to watch TV play. After he had finished… Not kn