语法及练习1 be动词Be 动词的用法： (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。(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. (3) 一般疑问句 Are you a Chinese? Yes, I am. No, I amnt. Are they American? Yes, they are. No, they arent. Is the cat fat? Yes, it is. No, it isnt. 用恰当的be动词填空。 1. I _ a boy. _ you a boy? No, I _ not. 2. The girl_ Jacks sister. 3. The dog _
