1.there is+第三人称单数可数/不可数主语+地点状语(介词短语)
(1)There is a ruler on the desk.书桌上有一把尺。
(2)There is some water in the bottle.瓶子里有一些水。
2.there are+复数主语+地点状语(介词短语)
(1)There are four apples on the tree.树上有四个苹果。
(2)There are many flowers in the park.公园里有许多花。
3.There is+第三人称单数可数+v-ing+地点状语(介词短语)
(1)There is a bird singing in the tree.树上有一只鸟正在唱歌。
(2)There is a baby sleeping in the room.房间里有一个宝宝正在睡觉。
4.There are+复数主语+v-ing+地点状语(介词短语)
(1)There are some birds singing in the tree.树上有一些鸟正在唱歌。
(2)There are two boys running on the street.街上有两个男孩正在奔跑。