be 动词用法歌：我用 am,你用 are，is 连接他，她，它。 单数名词用 is，复数名词全用 are。变疑问，往前移，句末问号莫丢弃。 变否定，更容易，be 后 not 莫忘记。疑问否定任你变，句首大写莫迟疑。 解析: I am; You are; He is; She is; It is; We are; You are; They are.一、 用 am, is, are 填空 1. I _ a boy. _ you a boy? No, I _ not. 2. The girl_ Jacks sister. 3.-How_ you?I _ fine, thanks. 4. -How _your mother?She_ fine, too.5.What _this in English?-It _an orange. 6. Where _ your mother? 7
