Unit 2 Section A 4a-4c 课件 2023-2024学年人教版英语八年级下册

Unit 2 Section A3 (4a-4c) I'll help to clean up the city parks. Objective To learn the usage of infinitives I’d like to help homeless people. Mario believes it can help him to get his future dream job. She decided to try out for a volunteer after-school reading program. raise midnight alone v. 募集；征集 n. 午夜；子夜 adv. 独自；单独 Words Review Do you still remember Mario and Mary From Riverside High school? Mario wants to be an animal doctor. He volunteers at an animal hospital. He wants to learn more about how to care for animals. Mary is a book lover. She works in an after-school program to help kids to read. 红色字体是什么？有什么作用呢？ 是不定式，不定式的基本形式是to do(to有时可省略) 否定形式是 not to do. 做宾语 做宾语 做宾语 做目的状语 做宾补 infinitives不定式的用法 It’s very important to learn English. 形式主语 系动词 表语 真正的主语 动词不定式可在句中作宾语、宾语补足语和状语等。 一、作宾语： 1) You must learn to look after yourself. 你必须学着照顾自己。 2) They volunteer to clean up the house for the old lady. 他们自愿给老人打扫房子。 动词不定式的用法 不定式常出现在一些及物动词后，如：want to do, plan to do, agree to do, learn to do等。 二、作宾语补足语： 1) The teacher asks us to come to school early. 老师要求我们早点到校。 2) I tell him to arrive on Sunday. 我让他周日到。 动词不定式用来补充说明宾语的情况。有些动词要求动词不定式必须带to，有些要求不带to。 I. 有些动词如ask, teach, tell, advise, invite等后接带 to的动词不定式作宾语补足语。 1) My parents sometimes make me do some housework. 我父母有时让我做些家务活。 2) I saw him work in the garden yesterday. 昨天我看见他在花园里干活了。 III. help后的动词不定式可加to，也可不加to。 II. 感官动词(hear, see, watch等)和使役动词(make, let等)后接不带to的动词不定式作宾语补足语。 Could you help me (to) do some cleaning? 你能帮我打扫卫生吗？ 1) The girl could visit the sick kids in the hospital to cheer them up. 那个女孩可以到医院去哄生病的小孩子开心。 2) To explain more clearly, I’ll show you some pictures. 为了解释得更清楚，我会给你们看一些图片。 3) She still works there once a week to help kids learn to read. 她仍坚持一周一次去那里教孩子们读书。 三、作目的状语： 动词不定式可表示某一动作或状态的目的，位于句首或句尾。 动词不定式的否定形式由“not + 动词不定式”构成。 1) Tell them not to throw paper on the ground. 叫他们不要把纸扔在地上。 2) His father told him not to play in the street. 他爸爸告诉他别在街上