Unit 2 SectionA Grammar-4c 课件 2022-2023学年人教版英语八年级下册

Unit 2 I’ll help to clean up the city parks. Section A Grammer Focus-4c Yangchun in March, the annual anniversary and to learn from Leifeng, and people began to learn a variety of actions to Leifeng. 阳春三月，一年一度的学雷锋纪念日又到了，人们开始以各种行动向雷锋学习。 What could you do to help others? We could put up notices to publicize Lei Feng Day. We could raise the money for homeless people. We should study hard to improve myself. I’d like to help out people with disabilities. If we are volunteers, we could ... 动词不定式（infinitive) to + v.原形 Grammar Focus 1. I’d like to help homeless people. 2. You could ask hospitals to let you visit the kids and cheer them up. 3. She volunteers there once a week to help kids learn to read. 4. She decided to try out for a volunteer after-school reading program. 5. Mario believes it can help him to get his future dream job. 6. I’m making some signs to put up around the school. would like to do sth. ask sb. to do sth. volunteer... to do sth. decide to do sth. help sb. to do sth. make ...to do 动词不定式（infinitive) 动词不定式（infinitive) 定义：动词不定式是非谓语动词的一种，它没有人称和数的变化，在句中不能作谓语。 构成：动词不定式的基本形式“to+动词原形”，写作to do(有时候to可以省略） 用法：动词不定式具有名词，形容词和副词的特征。因此可在句中作主语，宾语，宾语补足语，定语和状语。 ① ② ③ To learn foreign languages is very useful. 做主语时，一般位于句首，相当于名词或代词，谓语动词用单数，有时候为了避免头重脚轻，常用it做形式主语。 I think it’s necessary for us to read a lot. 做主语 做表语 My duty is to look after the animals. 做表语时常表示主语的“职业，职责或性质”等。从时间概念上说含有将来意义，常用于be动词的后面。 To work means to earn a living．工作意味着谋生。 主语是不定式(表条件)；表语也是不定式(表结果) 不定式常出现在一些及物动词后，构成动词短语。 做宾语 I hope to see you tomorrow. He taught me how to use mobile phone. 另一种是“及物动词+疑问词+带to的不定式”。 如：want to do, plan to do, agree to do, learn to do等 做宾补 They asked him to sing a pop song at the party. 常接不定式做宾补的动词有： tell，ask, want, teach, allow, promise, order, advice, expect, wish, invite, encourage, make, warn, help 做状语 ①做目的状语：可以放在句首，一般用逗号隔开，也可以放在句尾。 To get there on time, they started early. ②做结果状语：常用在too...to...结构中。 The boy is too young to