e 动词有三个 is am are. 有个口诀可以帮你记住用法:I用am,you用are, is用于他她它(he she it),复数在前还用are(我们we,你们you,他们they) 举is为例: 肯定句:He is a teacher.他是老师. 否定句: He is not a teacher. 他不是老师.(变否定句在be动词后加not) 复数形式:They are teachers. 他们是老师.(他的复数他们they,然后按口诀选be动词are) 一般疑问句: Is he a teacher?(一般问句把Be动词提至主语前) 肯定回答:Yes, he is.(肯定回答一定是Yes开始,然后看问句.) 否定回答:No, he is not.(否定No,然后在肯定基础上加not)