作者：谢宗春
川剧中的"变脸"变化多端，精彩绝伦，令人叹为观止！There be句型是我们刚认识不久的好朋友，看看它是怎样"变脸"的吧。
1. 变脸一：否定句
There be句型的否定式的构成和含有be动词的其它句型一样，在be后加上not或no即可。注意not和no的不同：not是副词，no为形容词，not a/an/any + n. 相当于no+ n.。例如：
There are some pictures on the wall. →There aren't any pictures on the wall. =There are no pictures on the wall.
There is a bike behind the tree. → There isn't a bike behind the tree. =There is no bike behind the tree.
2. 变脸二：一般疑问句
There be句型的一般疑问句变化是把be动词调整到句首，再在句尾加上问号即可，此为"调整法"。但同时要注意：当肯定句中有some时，要将其改为any（否定变化也一样）。看看下面两句是如何"改头换面"的吧：
There is some water on Mars. → Is there any water on Mars?
There are some fish in the water. →Are there any fish in the water?
3. 变脸三：特殊疑问句
There be句型的特殊疑问句形式有以下三种变化：
① 对主语提问：当主语是人时，用"Who's+介词短语?"；当主语是物时，用"What's + 介词短语?"。注意：无论原句的主语是单数还是复数，对之提问时一般都用be的单数形式(回答时却要根据实际情况来决定)。如：
There are many things over there. →What's over there?
There is a little girl in the room.→Who is in the room?
② 对地点状语提问：提问地点当然用"Where is / are+主语?"啦！例如：
There is a computer on the desk. → Where is the computer?
There are four children on the playground. →Where are the four children?
③ 对数量提问：一般有两种句型结构：
How many+复数名词+are there+介词短语？
How much+不可数名词+is there+介词短语？