1. 基本结构
There be +主语 + 地点 /时间状语。如：
There is a computer in the room. 房间里有一台电脑。
There are two TV plays every evening. 每晚有两场电视剧。
2. 主谓一致
要采取就近一致原则，和* 近be的主语一致。如：
There is a pen, two rulers in the box. 盒子里有一只钢笔，两把尺子。
There are two boys and a teacher at the school gate. 门口有两个男孩，一个老师。
