(
课件网) 【知识精讲】助动词 四年级 英语 发布课文朗读任务 （任务-发布任务-自定义任务） 助动词自身没有词义，不可单独使用。协助用来协助主要动词，被协助的动词称作主要动词。 助动词的种类 助动词的用法 最常用的助动词都有哪些？ 常用的助动词有：be，have，has， do，does ，did，will 助动词的作用 与主要动词构成时态； 与主要动词构成疑问句； 与主要动词构成否定句； 构成固定搭配表达固定的意思； 助动词be的主要用法有：am is are 1. 与现在分词构成现在进行时： She is reading a book in the classroom. 2. be going to do构成一般将来时： They are going to swim in the sea. 助动词be的用法 在have got和has got为助动词，表达“有”的意思： I have got three apples. She has got a big ball. 助动词have\has的用法 用于一般现在时构成一般疑问句和否定句: 如：I like this book. Do you like this book？ I don’t like this book. 助动词do的用法 用于一般现在时构成一般疑问句和否定句: 如：My brother studies English well. Does your brother study English well？ My brother doesn’t study English well. 助动词does的用法 用于一般过去时构成一般疑问句和否定句: 如：I played football yesterday. Did you play football yesterday I didn’t play football yesterday. 助动词did的用法 will用于一般将来时： We will have a party tomorrow. Will you have a party tomorrow What will you do？ 助动词will的用法 单项选择。 Ma Xiaotiao _____ like music. A. don't B. doesn't C. doing 答案：B 单项选择。 Ma Xiaotiao _____ like music. A. don't B. doesn't C. doing 选择合适的单词补全句子。 _____ she got a new MP4 A. Have B. Has 答案：B 选择合适的单词补全句子。 _____ she got a new MP4 A. Have B. Has
