英文渣子请教there be句型的结构及运用（最好有例句）

"There +be + 主语 + 状语"句型中,be 与其后的主语在人称和数量上一致,有时态和情态变化.下面是该句型的不同变形：
现在有 there is/are …
There is a book on the desk.
过去有 there was/were…
There was a theatre near my house in the past
将来有 there will be…/there be going tobe...
There is going to be a meeting this afternoon.
现在已经有 there has/have been…
There have been great changes in our school since 2006
可能有 there might be...
There might be an opportunity for you to go abroad for further study.
肯定有 there must be …/there must have been...
There must be someone who knows the truth.
过去有 there used to be …
There used to be many old ladies dancing in the square.
似乎有 thereseems/seem/seemed to be …
There seems to be new problem.
碰巧有 there happen/happens/happened to be …
There happened to be a doctor around offering first aid to him.
此句型有时不用be动词,而用live,stand,come,go,lie,remain,exist,arrive,等,使表达效果更生动形象,例如：
There stands a tall tree by the school gate.
There lies a stream in front of my house.
Once there lived an emperor who loved fine new clothes.
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