there be用法
一、构成：There be ...句型表示的是 “某处有(存在)某人或某物”,其结构为There be(is,are,was,were )+名词+地点状语.例如：
There are fifty-two students in our class.
二、各种句式：
否定句：There be句型否定句式的构成和含有be动词的其它句型一样,在be后加上“not”.也可用“no”来表示.即：no + n.（名词）= not a\an\any + n.（名词）.注意：no + n.（可数名词单数）= not a\an + n.（可数名词单数）；no + n.（可数名词复数）= not any + n.（可数名词复数）；no + n.（不可数名词）= not any + n.（不可数名词）.例如：
There is an orange in her bag.
→There isn’t an orange in her bag.
→There is no orange in her bag.
一般疑问句：There be结构的一般疑问句变化只需把be动词移到句首,再在句尾加上问号即可.例如：There is some money in her handbag. → Is there any money in her handbag?(疑问句和否定句中,some改为any,something改为anything.)
特殊疑问句：
There be句型的特殊疑问句有以下三种形式：
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?”.其中there在口语中常常省略.注意：无论原句的主语是单数还是复数,对其提问时一般都用be的单数形式(回答时却要根据实际情况来决定).如：There is a bird in the tree.→What’s in the tree?There are some bikes 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：用 “Where is \ are + 主语?”表示（注意其答语变化）：例如：
There are four children in the classroom.
→Where are the four children?—They’ re in the classroom.③对数量提问：一般有两种提问方式：
如果主语是可数名词,无论是单数还是复数,都用“How many +可数名词复数 + are there + 介词短语?”表示：
There are twelve months in a year.
→How many months are there in a year?
如果主语是不可数名词,则用“ How much + 不可数名词 + is there + 介词短语?”表示：
There is some money in my purse.How much money is there in
your purse?
反意疑问句：There be或There加其它动词,其反意疑问句一律用…there?例如：
There is a beautiful girl in the garden,isn’t there?
There used to be no school here,used there \did there?
