be動詞的意思和用法很多，一般的意思是：是。be動詞的用法有多種變化形式：is，am，are，was，were，being，been，to be。

be動詞的用法口訣

我(I)用am, 你(you)用are，is連著他(he)，她(she)，它(it)。

單數(shù)名詞用is，復(fù)數(shù)名詞全用are。

變否定，更容易，be后not加上去。

變疑問，往前提，句末問號莫丟棄。

還有一條須注意，句首大寫莫忘記。

be動詞的用法

一，系動詞be

be為連系動詞，中心詞義是"是"，句型為"主+系+表"結(jié)構(gòu)。be的形式常用am, is, are(現(xiàn)在式);was, were(過去式);will/can/may/must be(助動詞/情態(tài)動詞+原形);have/has/had been(助動詞+過去分詞)等。

例句：

To help animals is helping people.(一般現(xiàn)在時)

The twins were very busy yesterday.(一般過去時)

It will be sunny tomorrow.(一般將來時)

She has been ill for over a week.(現(xiàn)在完成時)

二、助動詞be

助動詞be，無詞義，輔助主要動詞一起在句中作謂語動詞。用法如下：

1、be+doing：構(gòu)成進(jìn)行時態(tài)，有現(xiàn)在和過去兩種進(jìn)行時態(tài)。

例句：

The girls is reading and copying the new words now.

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

2、be+done：構(gòu)成被動語態(tài)(主語是動作的承受者，done必須是及物動詞)。

例句：

Tea is grown in my hometown.(一般現(xiàn)在時的被動語態(tài))

This building was built three years ago.(一般過去時的被動語態(tài))

Our classroom has been cleaned and tidied already.(現(xiàn)在完成時的被動語態(tài))

How could this kind of cakes be made in your home?(含情態(tài)動詞的被動語態(tài))

That is a day never to be forgotten.(動詞不定式的被動語態(tài))

3、be+going to do，表示"打算或?qū)⒁瞿呈?quot;，be有現(xiàn)在和過去兩種形式。

例句：

We are going to plant trees in the park.

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

4、be+to do，表示"按計(jì)劃安排將要做某事"。

例句：

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.

三、be動詞的用法there be句型

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，過去時和將來時等。

例句：

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?

四、實(shí)義動詞be

可以將be視為實(shí)義動詞，因?yàn)樗哂袑?shí)際的詞義，如"成為;做;發(fā)生;舉行;逗留;到達(dá)"等。

例句：

His daughter wants to be a doctor for animals in her twenties.

Kate's birthday party will be at half past six this evening.

Jim has been in China for more than two years, but he has not yet been to Yichang.