回答如下：

there be 句型的用法：

1. 肯定句结构：

There + be + 主语+其他。例如：

There is a doctor in the hall.

There are two books on the desk.

2. 否定句结构：

There + be + not + 主语 + 其他。例如：

There is not / isn't any car stopping at the gate.

There are not / aren't two boys who are playing games.

3. 疑问句结构：

Be + t here + 主语 + 其他。例如：

Is there any water in the thermos?

Are there lots of problems to settle / to be settled ?