Unit 2 Morals and Virtues 第3课时 Discovering Useful Structures（教学课件）-2023-2024学年高一英语同步精品课堂（人教版2019必修第三册）

Unit 2 Morals and Virtues Teaching objectives 1. Identify and understand the meaning and functions of the -ing form used as the adverbial and the object complement. 2. Use the -ing form as the adverbial and the object complement to describe people’s actions and experiences. 3. Learn to compare the -ing form and past participles. Period 3 Discovering Useful Structures 不定式 to do 过去分词 v-ed 动名词 v-ing 现在分词 v-ing 非谓语动词 1 2 3 4 动词 v-ing 2 3 Lead-in 动词 -ing V-ing 形式由 “do＋ing” 构成, 其否定形式是 “not doing”, V-ing 可以带宾语或状语构成 V-ing 短语, 没有人称和数的变化, 但有时态和语态的变化。 　语态 时态 主动语态 被动语态 一般式 完成式 (not) doing (not) being done (not) having done (not) having been done doing的一般式和完成式 Lead-in 观察下面句子并分析画线部分在句中所作的成分   1. Playing with fire is dangerous. 主语 2. Peppa and George always love skipping in muddy puddles. 佩奇和乔治总喜欢在泥坑里跳来跳去。 3. His hobby is dressing up as a girl. 他的爱好是打扮成女孩子的样子。 宾语 表语 Lead-in 4. The man doing the live broadcast is called Dong Yuhui. 正在做直播的这位男士名叫董宇辉。 定语 5. Focusing on her phone as she walked, she hit the door. 状语 6. The headteacher saw Li Ming playing with smartphone in the classroom. 宾语补足语 Focus on 基本用法 the –ing form used as adverbial Explanation Done 时间: 原因: 条件： 让步： 方式或伴随或结果： 非谓语动词作状语相当于一个状语从句或并列句 可转换为由“when, while, until引导的时间状语从句 可转换为由since, because或as引导的原因状语从句 可转换为由if, once或unless引导的条件状语从句 可转换为由though/although引导的让步状语从句 可转换为并列句 被动 过去 Doing 主动 进行 逻辑主语必须与句子的主语一致 现在分词作时间状语时，相当于时间状语从句。可在现在分词前加连词“when, while, until”等，使其时间意义更明确 Walking in the park, she saw an old friend. ＝When/while(she was)walking in the park, she saw an old friend. 1. v-ing形式作时间状语 逻辑主语与句子的主语一致；主动 / 进行 改写下面的时间状语从句 When he walked out of the room, he saw a dog. Walking out of the room, he saw a dog. 现在分词作原因状语时，可转换为由since, because或as引导的原因状语从句，这类状语多放在句子的前半部分。 Being ill，he couldn't go to school. ＝As he was ill，he couldn't go to school. 2. v-ing形式作原因状语 逻辑主语与句子的主语一致；主动 / 进行 Not knowing the way, he got lost. 翻译句子：由于不认路，他迷路了。 As he __________________, he got lost. didn’t know the way V-ing形式的否