2.there be存在句的谓语动词有时是seem to be等

there be存在句的谓语动词有时是be likely to be，be unlikely to be，be liable to be，be sure to be，be certain to be，be bound to be，be apt to be，be due to be，happen to be，seem to be，need to be等。

There are unlikely to be any problems with the timetable．

时间表不可能有什么问题。

There is certain to be trouble on the border．

边界一定有麻烦。

There seemed(to be)something the matter with her．

她似乎有毛病。

There happened to be a typewriter in the room．I used it to type two envelopes．

房间里恰好有一台打字机。我用它打了两个信封。

Of every find there needs to be a written record，to which a photograph must be added．(人教大纲版高二下第148页)

对于每一个发现，必须有一个书面记载，还要附上照片。