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there be句式有时可以与情态动词连用。
与 can / could 连用
There can be no doubt about that. 那是毫无疑问的。
Without heavy industry there can be no economic advance. 没有重工业，就没有经济的发展。
If the police hadn’t closed the road there could have been a bad accident. 要不是警方关闭了道路，本来会发生严重车祸的。
与may / might 连用
There might still be hope. 可能还有希望。
There may be a letter for me. 大概有我一封信。
There may be a storm tomorrow. 明天可能有风暴。
At the end there may be an index. 结尾处可能有索引。
There might be drinks if you wait for a bit. 如果你等一会儿，可能会有饮料。
There may be more importance in it than would seem. 它的重要意义可能要比看上去大。
与must 连用
There must be a mistake. 一定是弄错了。
He felt there must be something wrong. 他感到准有什么问题。
There must be somebody at home—ring again. 家里肯定有人——再按一下铃。
There must be some book which could help. 一定有那么本书可以帮我们的忙。
That can’t be the only way. There must be other ways of solving the problem. 那不是解决问题的唯一办法，肯定有另外的办法。
与 should 连用
There shouldn’t be any doubt about it. 对此不应有什么怀疑。
It is important that there should be afire escape. 要有一个太平梯，这很重要。
The widow begged that there should be no reprisals. 遗孀祈求不要去搞复仇。
与 ought to 连用
There ought to be a comma here. 这儿应有一个逗号。
There shouldn’t be any doubt about it. 对此不应有什么怀疑。
There ought to be traffic lights at this crossroads. 这个十字路口应该有红绿灯。