第一讲： 动词一.Be 动词（am, is, are）的用法口诀：I 用am , you 用are ,is 连着他（he）她（she）它（it）。单数全部用is，复数一律都用are. 变疑问，往前提，句末问号莫丢弃，变否定，更容易，be 后not莫忘记，句首大写莫迟疑。I _ a student. You _ Japanese. He _ my brother. She_ very nice. My name _Harry. LiLei _ very tall. This book_ very interesting. Li Lei and I _ g
