1. Be動(dòng)詞有三個(gè)，am,is還有are.我用am, 你用are, is跟著他她它，復(fù)數(shù)全部都用are.

如果遇到過去時(shí)，was來把a(bǔ)m,is替，were來把換掉動(dòng)詞are

2. do和be動(dòng)詞的用法區(qū)別

Be 動(dòng)詞就是(am，are,is)..句子中如果沒有實(shí)意動(dòng)詞(例如:write，buy)之類的動(dòng)詞，就直接在主語后面加Be動(dòng)詞。而如果是句子中有實(shí)意動(dòng)詞，那么如果你要改為一般疑問句，就要借助DO(do也稱為助動(dòng)詞)，例如:I study.

改為一般疑問句:Do you study ?

順口溜：be氏三朵花, am, is還有are,

我(I)戀am, 你(you)戀are,

is跟了他(he)她(she)它(it),

單娶is, 復(fù)娶are。

詳細(xì)講解：

英語的be 動(dòng)詞是個(gè)用法比較復(fù)雜的動(dòng)詞。復(fù)雜的原因有兩點(diǎn)：

1、 除了原形的 be 之外，對(duì)于不同人稱代詞以及單數(shù)名詞和復(fù)數(shù)名詞，be 會(huì)有各種變化形式和縮寫形式。概括一下有七種形式：be, am, is, are, was, were, been, being。它們與人稱代詞和名詞單、復(fù)數(shù)的搭配關(guān)系是：

現(xiàn)在時(shí) I am, you are, he/she/it/ is, we/you/they are;名詞單數(shù)、不可數(shù)名詞用is，復(fù)數(shù)用are。

縮略式 I'm, you're, he's, we're, you're, they're

否定縮略式 I'm not, isn't, aren't

過去時(shí) I was, you were, he/she/it/ was, we/you/they were;名詞單數(shù)、不可數(shù)名詞用was，復(fù)數(shù)用were。

否定縮略式 wasn't, weren't

過去分詞 been

現(xiàn)在分詞 being

2、在句子中，be有兩種主要作用：一是作為系動(dòng)詞(The Linking Verb)，本身可以作用謂語動(dòng)詞;二是做為助動(dòng)詞(The Auxiliary Verb)，與謂語動(dòng)詞一起構(gòu)成各種時(shí)態(tài)和被動(dòng)語態(tài)等。

下面做個(gè)簡要的講解。

一、be 動(dòng)詞做系動(dòng)詞

1、系動(dòng)詞+表語”的結(jié)構(gòu)

當(dāng)be 動(dòng)詞做系動(dòng)詞使用時(shí)，主要構(gòu)成“系動(dòng)詞+表語”的結(jié)構(gòu)，在句子中做謂語。表語可以是名詞、形容詞、副詞、介詞短語等。例如：

The man is a science teacher.

Mary's new dresses are colourful.

Mother is in the kitchen now.

I have been there before.

They shall be here at 10:00 tommorow.

That can't be true.

You are not being very polite.

Your brother is being very annoying this evening

2、be 動(dòng)詞的一般疑問句，方法是把be 移到主語前面，也可說成是移到句首。

Is the man a science teacher? Yes, he is. / No, he isn't.

Are Mary's new dresses colourful? Yes, they are. / No, they aren't.

Was mother in the kitchen then? Yes, she was. / No, she wasn't.

Were you at home the day before yesterday? Yes, I was. / No, I wasn't.

Was she late this morning? Yes, she was. / No, she wasn't.

3、be 動(dòng)詞用在特殊疑問句

在特殊疑問句里，be 動(dòng)詞仍然移到主語前面，但特殊疑問句是以特殊疑問詞開頭的，所以be 動(dòng)詞只能說是移到主語前面，或者說是在特殊疑問詞的后面。例如：

Whose bike is broken? Xiao Ming's 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? He is ten.

4、be 動(dòng)詞的否定句

be 動(dòng)詞做謂語時(shí)，它的否定形式是在be 后加not，并且可以縮寫。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 wasn't here yesterday.

My parents weren't at home last Sunday.

5、be 動(dòng)詞的祈使句

be 動(dòng)詞的祈使句有肯定和否定兩種形式�？隙ㄐ问绞且詁e 動(dòng)詞開頭，而否定形式或強(qiáng)調(diào)句形，要加don't 或do。例如：

Be careful!

Be a good boy!

Don't be silly!

Don't be a fool!

Do be obedient!

Do be careful.

二、be 動(dòng)詞做助動(dòng)詞

助動(dòng)詞be 有兩個(gè)基本用法，一是與謂語動(dòng)詞一起構(gòu)成各種時(shí)態(tài)，二是構(gòu)成被動(dòng)語態(tài)。

1、“be + 現(xiàn)在分詞組”成各種進(jìn)行式時(shí)態(tài)。例如：

Tony's maid is washing his new car.

The children are playing in the field.

Samuel was eating when I came in.

We have been living here since 1959.

This time next day they will be sitting in the cinema.

三、注意事項(xiàng)

英語句子中，為了表達(dá)時(shí)態(tài)或被動(dòng)語態(tài)的需要，常常會(huì)出現(xiàn)幾個(gè)助動(dòng)詞連在一塊兒使用。也就是說，助動(dòng)詞be會(huì)和其它助動(dòng)詞一起使用。這時(shí)候，整個(gè)句子的一般疑問句和否定句，就不一定是對(duì)be 進(jìn)行變化了，而是以第一個(gè)助動(dòng)詞為主進(jìn)行變化。即哪個(gè)助動(dòng)詞在先，就以它為主進(jìn)行變化。例如：

[肯定句] All the wonderful birds can be found in our Bird Park. (助動(dòng)詞有兩個(gè)：can be )

[疑問句] Can all the wonderful birds be found in our Bird Park? (移第一個(gè)can)

[否定句] All the wonderful birds can not be found in our Bird Park. (在第一個(gè)can 后加not)

[肯定句] I have been there before. (兩個(gè)助動(dòng)詞：have, been )

[疑問句] Have you been there before?

[否定句] I have not been there before.

[肯定句] I shall be having my supper at six tomorrow evening. (兩個(gè)助動(dòng)詞：shall, be )

[疑問句] 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.　　助動(dòng)詞be，無詞義，輔助主要?jiǎng)釉~一起在句中作謂語動(dòng)詞。用法如下：

1. be+doing：構(gòu)成進(jìn)行時(shí)態(tài)，有現(xiàn)在和過去兩種進(jìn)行時(shí)態(tài)。如：

The girls is reading and copying the new words now.

Young Tom was always asking questions and trying out new ideas.

2. be+going to do，表示"打算或?qū)⒁�做某�?quot;，be有現(xiàn)在和過去兩種形式。如：

We are going to plant trees in the park.

I didn’t know if she was going to come here.

3. be+to do，表示"按計(jì)劃安排將要做某事"。如：

The new shop is not to be opened till next Monday. One night an angel came to

Mary and told her that she was to have this special boy.

五.there be

there be句式為：there be+主語部分+狀語部分，表示"某處存在某物"，be常用現(xiàn)在時(shí)，過去時(shí)和將來時(shí)等。如：

Oh, cool! And there are many things to see. There is even a deer park in Sanya.

There are about 80 pyramids in Egypt.

Will there be a football match in your school next week?

六，實(shí)義be

可以將be視為實(shí)義動(dòng)詞，因?yàn)樗�具有�?shí)際的詞義，如"成為;做;發(fā)生;舉行;逗留;到達(dá)"等。如：His daughter wants to be a doctor for animals in her twenties.Kates birthday party

will be at half past six this evening.Jim has been in China for

morethan two years, but he has not yet been to Yichang.

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