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There is + a/an +单数可数名词
There is + 不可数名词
eg:There is a book on the desk .
桌子上有一本书。
There is some water in the bottle .
瓶子里有些水 。
b . There are + 复数名词
eg : There are some pictures on the wall .
墙上有些图画 。
There are two apples in the basket .
篮子里有两个苹果。
Exercise time (PPT 5 )：Choose the best answer .
Look at the pictures and make sentences .(PPT6-9)
Step 3 Grammar :there be就近原则
There 是个近视眼 ，讲解就近原则。
就近原则：若句子中有几个并列主语时，be动词的形式要与离其最近的一个主语在人称和数上保持一致。
Do some exercises :Choose the best answers (PPT12-17)
There be 句型的否定句和一般疑问句
a.否定句：在be动词后加not,如果句中有some，一般要变成any
There are two books on the desk.
There aren’t two books on the desk .
There is some bread in the plate .
There isn’t any bread in the plate .
一般疑问句：be动词（is，are）要提到句首，some 变any，其他不变。
There is a mouse in the house .(变成一般以为句)
Is there a mouse in the house ?
There are some flowers in the garden .(变成一般疑问句)
Are there any flowers in the garden ?
对There be 结构中的主语提问的特殊疑问句的基本结构：
What’s + 介词短语（介词+地点名词）+ ？中间通常不用there