be动词的的概念与用法

1、学习好资料欢迎下载1. Be动词有三个，am,is还有are.我用am,你用are, is 跟着他她它， 复数全部都用are.如果遇到过去时，was来把am,is替，were来把换掉动词are2. do和be动词的用法区别Be动词就是(am, are,is).句子中如果没有实意动词(例如:write ，buy)之类的动词，就直接在主语后面加Be动词。而如果是句子中有实意动词，那么如果你要改为一般疑问句，就要借助DO(do也称为助动词)，例如:l study.改为一般疑问句:Do you study ?顺口溜：be氏三朵花,am, is 还有 are,我恋am,你(you)恋are,is 跟了他

2、(he)她(she)它(it),单娶is, 复娶are。详细讲解：英语的be动词是个用法比较复杂的动词。复杂的原因有两点：1、除了原形的be之外，对于不同人称代词以及单数名词和复数名词，be会有各种变化形式和缩写形式。概括一下有七种形式：be, am, is, are, was,were, bee n, bei ng。它们与人称代词和名词单、复数的搭配关系是：现在时 I am, you are, he/she/it/ is, we/you/they are;名词单数、不可数名词用is，复数用are。缩略式 rm, youre, hes, were, youre, theyre否定缩略式 rm

3、n ot, is nt, arent过去时 I was, you were, he/she/it/ was, we/you/they were;名词单数、 不可数名词用was，复数用were。否定缩略式was nt, were nt过去分词bee n现在分词being2、在句子中，be有两种主要作用：一是作为系动词(The Linking Verb)，本身 可以作用谓语动词；二是做为助动词(The Auxiliary Verb)，与谓语动词一起构 成各种时态和被动语态等。下面做个简要的讲解。一、be动词做系动词1、系动词+表语”的结构当be动词做系动词使用时，主要构成“系动词+表语”的结构，在

4、句子中做谓语。表语可以是名词、形容词、副词、介词短语等。例如：The man is a scie nee teacher.Marys new dresses are colourful.Mother is in the kitche n now.I have bee n there before.They shall be here at 10:00 tommorow.That cant be true.You are not being very polite.Your brother is being very annoying this eve ning2、be动词的一般疑问句，方法是把

5、be移到主语前面，也可说成是移到句 首。Is the man a scie nee teacher? Yes, he is. / No, he isnt.Are Marys new dresses colourful? Yes, they are. / No, they arent.Was mother in the kitche n the n? Yes, she was. / No, she was nt.Wereyou at homethe day before yesterday? Yes, I was. / No, I was nt.Was she late this morning

6、? Yes, she was. / No, she was nt.3、be动词用在特殊疑问句在特殊疑问句里，be动词仍然移到主语前面，但特殊疑问句是以特殊疑问 词开头的，所以be动词只能说是移到主语前面，或者说是在特殊疑问词的后面。 例如：Whose bike is broke n? Xiao Min gs bike is.Who was singing in the room? Mr. Zhang was.Where are you from? I am from Wuhu.What class were you in? We were in Class 2.How old is Tom?

7、He is ten.4、be动词的否定句be动词做谓语时，它的否定形式是在be后加not，并且可以缩写。例如：It is not sunny today.Tom and his friends are not in the park.You were not nine years old when I went to the university.He was not often late for his class when he was a student.I was nt here yesterday.My pare nts were nt at home last Sun day.5、

8、be动词的祈使句be动词的祈使句有肯定和否定两种形式。肯定形式是以 be动词开头，而 否定形式或强调句形，要加dont或do。例如：Be careful!Be a good boy!Dont be silly!Dont be a fool!Do be obedie nt!Do be careful.二、be动词做助动词助动词be有两个基本用法，一是与谓语动词一起构成各种时态，二是构成 被动语态。1、“ be +现在分词组”成各种进行式时态。例如：Ton ys maid is wash ing his new car.The children are playing in the field.S

9、amuel was eati ng whe n I came in.We have bee n liv ing here since 1959.This time next day they will be sitting in the cinema.三、注意事项英语句子中，为了表达时态或被动语态的需要，常常会出现几个助动词连在一块儿使用。也就是说，助动词be会和其它助动词一起使用。这时候，整个句子的一般疑问句和否定句， 就不一定是对be进行变化了，而是以第一个助动词为主进行变化。即哪个助动词在先，就 以它为主进行变化。例如：肯定句All the wonderful birds can be

10、found in our Bird Park.（助动词有两个：can be ）疑问句Can all the wonderful birds be found in our Bird Park?（移第一个 can）否定句All the wonderful birds can not be found in our Bird Park.（在第一个can后加not）两个助动词： have, bee n ）肯定句I have been there before.(疑问句Have you been there before?否定句I have not been there before.肯定句I sha

11、ll be having my supper at six tomorrow evening.（两个助动词：shall, be ）疑问句Will you be having my supper at six tomorrow evening?否定句I shall not be having my supper at six tomorrow evening.四. 助动词be,无词义，辅助主要动词一起在句中作谓语动词。用法如下：1. be+doi ng :构成进行时态，有现在和过去两种进行时态。如：The girls is readi ng and copy ing the new words now.Young Tom was always ask ing questio ns and trying out new ideas.2. be+going to do，表示”打算或将要做某事”，be有现在和过去两种形式。如：We are going to pla nt trees in the park.I didn t know if she was going to