therebe句型
therebe句型如下：
1、There is+单数可数名词/不可数名词+地点状语。
2、There are+复数名词+地点状语。
注意事项：there是引导词，在句中不充当任何成分，翻译时也不必译出。句子的主语是某人或某物，谓语动词be要与主语（某人或某物）的数保持一致。当主语是两个或两个以上的名词时，谓语动词要与跟它最近的那个名词一致。如：
（1）There is a bird in the tree.树上有一只鸟。
（2）There is a teacher and many students in ourclassroom.我们教室里有一位老师和许多学生。
（3）There are two boysand a girl under the tree.树下有两个男孩，一个女孩。
各种句型转化：
1、变成否定
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，nota/an/any+n.相当于no+n.。例如：
①There are some pictures on the wall.
→There aren't any pictures on the wall.
=There are no pictures on the wall.
②There is a bike behind the tree.
→There isn't a bike behind the tree.
=There is no bike behind the tree.
2、变成一般疑问句
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。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）。
①There is some water on Mars.
→Is there any water on Mars?
②There are some fish in the water.
→Are there any fish in the water?
3、特殊疑问句
对主语提问：当主语是人的时候，则用who引导，当主语是物的时候，则用what引导。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：
①There are many things over there.
→What's over there?
②There is a little girl in theroom.
→Who is in the room?
对地点状语提问：则用where引导。如：
①There is a computer on the desk.
→Where is the computer?
②There are four children on the playground.
→Where are the four children?
对数量提问：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？
