精选优质文档-倾情为你奉上be动词的用法一、口诀：我用am, 你用are, is用在他她它，复数全用are。例题：1. I _ a boy. _ you a boy? No, I _ not. 2. The girl_ Jacks sister. 3. The dog _ tall and fat. 4.The jeans _ on the desk. 二、有be动词的肯定句和否定句 I am from London. I am not from London.He is a teacher. She is in the dining room. My hair is long. Her eyes are small. 归纳：在有be动词的句子中，改否定句时只要在be动词_加上_。三、有be动词的一般疑
