There be 句型1.定义：There be句型表示某处存在某物或某人。
2. 结构：(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.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。
eg. ① There is a bird i n the tree. 树上有一只鸟。
② There is a teacher and many students in our classroom.我们教室里有一位老师和许多学生。
③ There are two boys and a girl under the tree. 树下有两个男孩，一个女孩。
3. There be句型与have的区别：(1) There be 句型和have都表示“有”的含义。
区别如下：There be表示“某处存在某物或某人”；have表示“某人拥有某物/某人”，它表示所有、拥有关系。
eg.①He has two sons.他有两个儿子。
②There are two men in the office.办公室里有两个男人。
(2)当have表示“包括”、“存在”的含义时，There be 句型与其可互换。
eg. A week has seven days. =There are seven days in a week. 一个星期有七天。
变脸一：否定句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，not a/an/any + n.相当于no+ n.。
例如：There are some pictures on the wall. →There aren't any pictures on the wall. =There are no pictures on the wall.There is a bike behind the tree. → There isn't a bike behind the tree. =There is no bike behind the tree.变脸二：一般疑问句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，此为\"调整法\"。
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）。
看看下面两句是如何\"改头换面\"的吧：There is some water on M ars. → Is there any water on Mars?There are some fish in the water. →Are there any fish in the water?变脸三：特殊疑问句There be句型的特殊疑问句形式有以下三种变化：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?\"。
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：There are many things 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：提问地点当然用"Where is / are+主语?\"啦！例如：There is a computer on the desk. → Where is the computer?There are four children on the playground. →Where are the four children?③ 对数量提问：一般有两种句型结构：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？不定冠词（indefinite articles）a/an 的用法不定冠词最基本的用途就是用来表示“一”这概念，如：① A stitch in time save s nine.② Jason is an internationally known scholar.此外，a/an 还有下列6 种用途：㈠常和time、measurement等有关的名词连用，以表示“每—” 的概念，如：③ I teach five days a week.④ This type of vegetables is sold at one dollar a kilo.⑤ My car usually runs sixty kilometres an ho ur.㈡常和hundred, thousand, dozen 以及数目及数量连用，如：⑥ That factory turns out at least a hundred tyres a day.⑦ Noel's monthly salary is a thousand dollars.⑧ I have a number of sponsored students.⑨ Mary has a lot of money.㈢在“of / at”后面出现，以表示“同一类”这概念，如：⑩ Birds of a feather flock together.11. Please come one at a time.12. Things of a kind come together, so do people of a mind.㈣常在“rather, quite, many, half, what, such”等字后面出现，形成固定用法，如：13. Tom is rather a fool.14. I think Chinese is quite a useful language.15. Many a student has asked that question.16. The visitor left half an hour ago.17. What a fine day it is!18. How can you say such a thing?㈤用在“so, as, too, how +形容词”这些结构里，如：19. We have not had so hot a day before.20. Susan is as clever a girl as Anna.21. That is too difficult a book for beginners.22. No one knew how serious a problem it was until later.㈥出现在许多惯用语中，如：23. Bob always has a bone to pick with others.24. Some students turned a deaf ear to the teacher's advice.25. All must learn a language with an eye to mastering it.26. I hope you will make an effort to attend the meeting punctually.27. Jason has an aversion to being idle.28. The news of Jack's sudden resignation came as a bolt from the blue.基数词，序数词一、数词的分类1. 基数词表示数目的词称为基数词。
其形式如下：A．从1——10one，two，three，four，five，six，seven，eight，nine，ten．B．从11——19eleven，twelve，thirteen，fourteen，fifteen，sixteen，seventeen，eighteen，nineteen．这里除eleven，twelve，thirteen，fifteen，eighteen为特殊形式外，fourteen，sixteen，seventeen，nineteen都是由其个位数形式后添加后缀-teen构成。
C．从21——99整数几十中除twenty，thirty, forty，fifty，eighty为特殊形式外，sixty，seventy，ninety 都是其个位数形式后添加后缀-ty构成。
表示几十几时，在几十和个位基数词形式之间添加连字符“-”21 twenty-one76 seventy-sixD．百位数个数基数词形式加“hundred”，表示几百，在几十几与百位间加上and．101 a hundred and one320 three hundred and twenty648 six hundred and forty-eightE．千位数以上从数字的右端向左端数起，每三位数加一个逗号“，”。
从右开始，第一个“，”前的数字后添加thousand，第二个“，”前面的数字后添加million，第三个“，”前的数字后添加billion。
然后一节一节分别表示，两个逗号之间最大的数为百位数形式。
2,648 two thousand six hundred and forty-eight16,250,064 sixteen million two hundred and fifty thousand sixty-four5,237,166,234 five billion，two hundred and thirty-seven million，one hundred and sixty-six thousand，two hundred and thirty-fourF．基数词在表示确切的数字时，不能使用百、千、百万、十亿的复数形式；但是，当基数词表示不确切数字，如成百、成千上万，三三两两时，基数词则以复数形式出现。
There are hundreds of people in the hall．大厅里有数以百计的人。