1.用于there be等句型

完全倒装用于there be句型或there加其他表示“存在”的动词如stand，sit，seem，happen，exist，lie，appear，live等结构中。(参见there be句型)

Conferences like the Earth Summit help people understand that there exist serious problems and that there is still time to take action．(人教大纲版高二上第68页)

像地球峰会这样的会议使人们了解到一些严重问题的存在，但采取措施还来得及。

There came a strange knock at the door．

门口传来奇怪的敲门声。

There lies a military factory in the valley．

兵工厂位于山谷。

There appears to have been a nasty accident．

似乎发生了一起严重的事故。

There happened a serious drought that year．

去年发生了严重的旱灾。