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主 讲: 金 小 玲 学习对象 ;七年级学生 一、什么是助动词 在英语中,助动词本身没有意义,只是帮 助实义动词完成某些语法功能,如构成否 定句、疑问句、简略答语等。 本节课我们主要探究do的基本用法。 二. 助动词do的基本用法 原形 do 现在时第三人称单数 does 过去式 did (本节课不作讲解) 1. 原形 肯定式: do 否定式: do not 缩略否定式: don’t 用法:do用在第一人称单复数、第二人称单复数和第三人 称复数做主语,且时态为一般现在时的句子中。 举例(for example): I like apples. 否定句: I don’t like apples. 一般疑问句及回答: Do you like apples? Yes, I do./ No, I don’t. 特殊疑问句: What fruit do you like? 2. 现在时第三人称单数 肯定式: does 否定式: does not 缩略否定式: doesn’t 用法:does用在第三人称单数做主语,且时态为一 般现在时的句子中。 注意:当does出现时,句子中用动词原形。 举例(for example): She likes bananas. 否定句: She doesn’t like bananas. 一般疑问句及回答: Does she like bananas? Yes, she does./ No, she doesn’t. 特殊疑问句: What fruit does she like? EXERCISES 1. What color ( A. do B. does C. are 2. What food ( A. do ) you like best? ) she like best? B. does C. is 3. Do you have a soccer ball? 肯定回答:( )否定回答:( 4. She has two brothers.(变为一般疑问句并做肯定回答) ( ) 5. They have a football.(对划线部分提问) ( ) ) ANSWERS: 1.A 2. B 3. Yes, I do. No, I don’t. 4. Does she have two brothers? Yes, she does. 5. What do they have?