初中英语课外辅导:点击 be 动词 |
http://www.sina.com.cn 2005/03/22 15:25 英语辅导报 |
[点击一] 基本形式 be动词有am, is, are三种形式。其使用方法可依据以下口诀:(I)我用am,(you)你用are, is连着他、她、它(he, she, it)。单数is,复数are。如: I am a doctor. You are a girl. She is at school now. This is a good book. Those are new desks. [点击二] 基本含义 be 动词的基本含义是“是”,有时也可不必译出。如: The flag is red. 这面旗是红色的。My father is forty-six. 我父亲四十六岁。 [点击三] 缩略形式 1. am, is和are与绝大多数主语或疑问词有缩略形式,分别为: 'm, 's和 're。如: I'm an English teacher. He's my good friend. They're some books. Where're the children? 2. is, are 与not可缩略成isn't和aren't。如: It isn't a map. You aren't in the same class. [相关链接] 特别提醒: 1. this与is没有缩略形式;am与not没有缩略形式。 2. 在对以be动词开头的一般疑问句作简略的肯定回答时,不能使用缩略形式。如: —Is his hair brown? —Yes, it is.(正) —Yes, it's.(误) [友情链接] 特别的话送给特别的你 be动词除了作系动词外,还可作助动词,典型用法之一就是与“动词-ing”形式一起构成现在进行时,此时它没有实际意义,变化规律同其作系动词时完全相同。如: They are talking. He's walking. It isn't singing. (文/郝广春;英语辅导报 冀教七年级版 04~05学年第21期; 版权归英语辅导报社所有,独家网络合作伙伴新浪教育,未经许可,不得以任何形式进行转载。) |