Unit 2 Section A (Grammar Focus～4c)课件 2023-2024学年初中英语人教版八年级下册

人教版 八年级下册 语法讲练 Unit 2 I’ll help to clean up the city parks. Teaching and learning goals(学习目标) 1、了解短语动词的含义、类型、用法。 2、能使用情态动词could表达建议。 3、掌握不定式的含义及在句中所作的成分及意义。 4、结合话题，能运用短语动词和不定式讨论志愿者活动。增强学生做志愿者活动和帮助他人的意识。 情景导入 Revision complete the sentences Mario and Mary ______ ____ several hours each week ____ _____ others.Mario wants ____ ____ an animal doctor.He volunteers at an animal hospital.He wants ____ _____ more about how to care for animals. Can you tell something about Mario to us? give up to help to be to learn 生成新知 Grammar Focus I’d like to help homeless people. She decided to try out for a volunteer after-school reading program. You could ask hospitals to let you visit the kids and cheer them up. Mario believes it can help him to get his future dream job. She volunteers there once a week to help kids learn to read. I’m making some signs to put up around the school. 动词不定式 1. 动词不定式的概述 动词不定式的基本形式是“to+动词原形”，常写作to do(有时to可以省略)，否定形式为not to do。 2.动词不定式的用法 不定式是一种非谓语动词形式，可以在句中作主语、宾语、宾语补足语、定语和状语等。 5 1.充当作主语： 动词不定式作主语时，常用it作形式主语，而将不定式放在后面作真正的主语。 例句：学外语很有用。 It’s very useful to learn foreign languages. 6 2.充当作宾语： 不定式常出现在一些及物动词后，常见的及动词有expect,want , plan , agree , learn，decide,choose等 例句：I want to talk with you. 我想和你谈谈 She has decided to leave . 她决定要离开 We plan to have a picnic on the hill. 我们计划去山上野餐 主语+谓语V. + to do 7 3.充当宾语补足语： 常接不定式作宾语补足语的词有tell, ask, want, teach, allow, promise, order, advise, expect, wish, invite, encourage 等。 例句：他们请他在宴会上唱一首流行歌曲。 They asked him to sing a pop song at the party. 动词+sb +to do sth 8 4.充当表语： 不定式充当表语常置于be动词之后，补充说明主语,常用于以下结构：My job/ dream/goal/aim/duty is… 例句：他的梦想是在不久的将来出国学习。 His aim is to study abroad in the near future． 9 5.充当定语： 不定式作定语应放于被修饰词之后。 例句：我想吃点东西。 I want to have something to eat. 他是第一个到教室的。 He is the first to come to the classroom. 10 6.充当状语： 动词不定式可表示目的，原因，结果，位于句首或句尾。 例句：她提高了她的声音，以便听得更好。 She raised her voice to be heard better． 他将去车站见他的朋友。 He will go to the station to meet his friends.  11