行为动词一般现在时的变化 一般现在时 表一 表二 注:简略式:is not = isn’t ;are not = aren’t do not = don’t does not = doesn’t 但am not 无简略式,不能写成amn’t 二、动词遇到单数第三人称时的表示方法 一般现在时的句型 1.肯定句构成:主语+动词 (注意人称变化) +其它成分 I have a dog. We like the little cat. She sings well. 2.否定句构成: 行为动词的否定句:主语+助动词(do/does) + not +动词原形+其它成分 He dosen't have a dog. He isn't young. We don't like the little cat. (借助于助动词do) She doesn't sing well. (借助于助动词does) 3.一般疑问句: A.行为动词的一般疑问句:助动词(do/does)+主语+动词原形 + 其它成分 Do you like it? Yes, I do. / No. I don't . Does he(she)/it like it? Yes, he( she )does. / No, he ( she )doesn't. Do they/we like playing basketball? Yes, they/we do. No, they/we don’t. B. 动词BE 的一般疑问句Am / Is /Are +主语 + 其它成分 Are you a teacher Yes, I am. / No, I am not. Are they students of your school.Yes they are / No they aren,t. 4.特殊疑问句:特殊疑问词 + 一般疑问句 What do you like? What do you do? How old are you? Where are you from? What class are you in? How do you spell it? ,指的是除be动词、情态动词和助动词之外的全部动 词。难点 1:主语不是第三人称单数的句子,肯定句:主+动词+宾语;否定句:主+don’t+动词+宾语;疑问句:Do