■ there be 结构中的be必须随着be后面名词的数及句子后面的时间，使用不同的形式或时态。如：
(1) There are fifty chairs, desks and a blackboard in our classroom.
我们的教室里有五十把椅子、五十张课桌和一块黑板。
(比较) There is a blackboard, fifty chairs and desks in our classroom.
我们教室里有一块黑板、五十把椅子和五十张课桌。
(2) There werent any high buildings in the village twenty years ago.
二十年前，村子里没有高楼大厦。
■ there be结构可与情态动词can, could, will, would, must, may, might, ought to 及某些不及物动词seem, appear, happen等连用，如：
(1) Do go into the hole, for there can be snakes in it.
不要进到洞里面去，因为洞里可能有蛇。
(2) The car doesnt run. There must be something wrong with it.
车不走了，肯定出了毛病。
(3) There seemed to be some people in the room, for the water is still hot.
