there be 句型的具体讲解谓语动词be要与主语（某人或某物）的数保持一致 这句话是啥意思？

there be 句型的具体讲解谓语动词be要与主语（某人或某物）的数保持一致 这句话是啥意思？
there be 句型的具体讲解
谓语动词be要与主语（某人或某物）的数保持一致 这句话是啥意思？

there be 句型的具体讲解谓语动词be要与主语（某人或某物）的数保持一致 这句话是啥意思？
英语中,There be句型常表示某处有某人或某物.
例如:There are always more than one hundred birds in the big tree every evening.每天傍晚那棵大树上总会有100多只小鸟.
比如说I have a book
He has a book
第一句主语是I 对应的谓语动词用have
第二句主语是he,对应的谓语动词用has
一、There be句型的用法:
1)There与be中间可插入一些表示推测的情态动词、表示时态的短语和一些动词短语,以强调某种语气.
例如:There must be some flowers in the box.盒子里肯定有些鲜花.
There happened to be some money in my pocket.我的口袋里碰巧有一些钱.
There will be a meeting this afternoon.注意:be不能换成have及have的变化形式.
2)There be句型常与过去时间状语连用,构成一些固定句型,用于故事发生的开头,交代故事发生的时间.
例如:Many years ago,there was such a beautiful girl called Caixia.很久以前有一个叫彩霞的美丽女孩.
3)There be句型可换成There come / go,以引起注意,加强语气.
例如:There comes the bus公共汽车来了.
4)There be句型或There加其他动词的句型,其动词的单复数,常采用就近一致的原则.
例如:There is a desk,two chairs and three benches in the room.There are two chairs,a desk and three benches in the room.5)There be或There加其他动词的句型,其反意疑问句一律用…there挂 例如:There is a cat in the garden,isn't there挂 There used to be no house here,used there / did there挂(过去这儿没有房子,是吗?)
二、使用There be句型时应注意:
1)There be句型中的be 有各种时态.
There is going to be a meeting tonight.今晚有个会议.
There was a knock at the door.有人敲门.
There has been a girl waiting for you.有个女孩一直在等你.
There will be rain soon.不久天就要下雨了.
2)动词be单复数形式要跟there be之后的主语保持一致.并且要根据就近一致原则来变换be 的单复数形式.例如:
There is a book on the desk.课桌上有一本书.
How many people are there in the city挂这个城市里有多少人口.
There is a pen and two books on the desk.课桌上有一个钢笔和两本书.
There are two books and a pen on the desk.课桌上有两本书和一个钢笔.
There are some students and a teacher in the classroom.在教室里有一些学生和一位老师.
There is a teacher and some students in the classroom.在教室里有一位老师和一些学生.
3)there be引到的句子结构中,用来修饰主语的不定式用主动形式和被动形式均可.
例如:There is no time to lose (= to be lost).时间紧迫.
There is nothing to see (=to be seen).看不见有什么.
4)There be句型的否定句和一般疑问句.记住下面的口诀:There be句型有特点,主语放在be后边.变否定,很简单,be后要把not添.变疑问,也不难,把be提到there之前；肯定句中有some,否定/疑问把any换.
例如:(1).There is a book on the desk.(变否定句) →There is not / isn't a book on the desk.(2).There are some chairs in the room.(变否定句) →There are not / aren't any chairs in the room.(3).There are some boys over there.(变一般疑问句) →Are there any boys over there?5)There be句型和have/has的区别:There be 表示某物存在于某个地方,have/has表示某人拥有某一样东西.
例如:There is a book on the desk.书桌上有一本书.
I have a book.我有一本书.二者有时也可以通用,表示"某物本身拥有……".