语法讲解与练习Be 动词的用法l (1) Am-was Is -was Are-were 口诀：我用am, 你用are, is 用在他她它，复数全用are 。*be 除了原型外的7 种形式：am is are was were been beingl (2) 肯定和否定句 I am (not) from London. He is(not) a teacher. She is(not) in the dining room. My hair is(not) long. Her eyes are(not) small. l (3) 一般疑问句 l (4)be + 现在分词 表示进行时态；be + 过去分词 表示被动语态练习：用恰当的be 动词填空 l 1. I _a boy. _you a boy? No, I _ not. l 2. The girl_ Jacks sister. l 3. The dog _ tall and fat. l 4. The man _ a teacher.l Tom with his parents ( ) go to the zool 5. _ you
