定向求助英语张老师.there be（to be/being）的用法.

定向求助英语张老师.there be（to be/being）的用法.
一、概说
英语中的there
be结构主要表示某处存在有某物,所以通常被称为存在句.其中的there为状语或者表语（因为相当于一个介词结构）,be为谓语动词,there be后面的名词为句子主语.
二、难点
There（表语） is（系动词） a boy（主语） in the water（状语）
（为倒装句：a boy is (there要省略,避免重复) in the water.）
Here（表语） is（系动词） another（定语） photograph（主语）?
（another photograph is here.）
There is no knowing（主语） what may happen.
（no knowing is what mayhappen（there这里一般不省略好））
通常说：How many students are there in the classroom?也可以说：How many students are in theclassroom?（不如上句用得多）
--（in the classroom are how many students（there一般不用了,这与上面不矛盾.））
——关于how many…are there…句式中省略there 的例句：
How many letters are in your name?你的名字有多少个字母?
（in your name are howmany letters）
How many tracks are on the CD?这张激光唱片上有多少首乐曲?
（one the CD are how manytracks）
以上的难点是我对句子成分的瓜分,）
三,主谓一致问题
:若只有一个主语,谓语的数则取决于该主语的数；若有几个主语并列,则通常是与靠近的主语保持一致：（这是因为这是个倒装句,但是却没有关系.）
There is a man at the door.门口有个人.
（aman is at the door(there=at the door)）
There are some girls in the room.房间里有几个女孩.
(somegirls are there(there=in the room))
四,
there be结构的时态由其中的谓语动词be来体现,它可以有一般现在时、一般将来时、一般过去时、现在完成时以及过去完成时等多种时态形式：
There is going to be an English film tonight.今晚将有一场英语电影.
（an
English film is going to be there tonight ）
There was a lot to be done.有很多事要做.
(A lot
was to be done there)
There were some children swimming in the river.有些小孩在河里游泳.
Some children
were (there去掉)
swimming in the river.
There had been two sea fights between them.他们之间发生了两场海战.
(Two
sea fights between them had been there.)
【【不够了,我在求助】】