Be动词例句

Be动词例句

be动词的一般现在时有三种形式,即：am,is,are.
1.如果主语是第一人称I（我）时,be动词用am.
如：I am a student.我是一名学生.
I am 还可缩写成I'm.如：
I'm David.我是大卫.
2.如果主语是you （你,你们）,they （他们,它们,她们）或名词复数 （两个以上的人或物）时,be动词必须用are.
如：Are you twelve?你是十二岁吗?
Tom and Lily are good friends.汤姆和莉莉是好朋友.
They are at school.他们在学校.
are与主语还可缩写.如：We are= We're,They are =They're,You are = You're.而are与 not可缩写成aren't.
如：They aren't students.他们不是学生.但是am与not不能缩写.
3.如果主语是单数名词、不可数名词或单数第三人称代词（he,she,it）时,be动词用is.
如:My mother is a teacher.我的妈妈是一名老师.
He is a student.他是一名学生.
is也可与主语缩写,如:He is = He's,My mother is = My mother's等.但是This is不可缩写.而is与not可缩写成 isn't.
如:This isn't a book.这不是一本书.
根据以上叙述我们可以把动词的用法以口诀的形式表述出来：
我（I）是am,
你（you）是are,
剩下is留给她（she）,他（he）,它（it）,
两个以上都用are.
[思路分析]
be作助动词用的形式如下：
①am,is,are,was,were
②助动词+be：shall be,will be,can be,etc.
③have/has/had + been（完成时）
④am,is,…being（进行时）
[解题过程]
（1）表达进行时态
句型 be + V-ing…（进行时态）
例：What are you reading?
（你正在阅读什么?）
I am reading a magazine.
（我正在阅读杂志.）
例：He will be taking a walk in the park at this time tomorrow morning.
（明天早晨此时他将会正在公园散步.）
例：She has been teaching English in our school for years.
（她已在我们学校教英语许多年了.）
解说 第一例句是表达现在进行时,第二例句是将来进行时,第三例句是现在完成进行时.
（2）表达被动语态
句型 be +p.p.…（被动语态）
例：English is spoken in both Canada and the United States.
（加拿大和美国都讲英语.）
例：Those keys were found in your drawer.
（那些钥匙是在你的抽屉里找到的.）
例：It can be done much faster in this way.
（这件工作用这个方法可以更加快速地做好.）

一.与人称有关的例句
be动词的意思是“是”，
I am fine, thank you.
Are you fond of the music? be fond of 是：喜欢的意思
He is my teacher.
We are good friends.
二.与时态有关的例句
1. be+doing：构成进行...

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一.与人称有关的例句
be动词的意思是“是”，
I am fine, thank you.
Are you fond of the music? be fond of 是：喜欢的意思
He is my teacher.
We are good friends.
二.与时态有关的例句
1. be+doing：构成进行时态，有现在和过去两种进行时态。如：
The girls is reading and copying the new words now.
Young Tom was always asking questions and trying out new ideas.
2. be+done：构成被动语态(主语是动作的承受者，done必须是及物动词)。如：
Tea is grown in my hometown.(一般现在时的被动语态)
This building was built three years ago.(一般过去时的被动语态)
Our classroom has been cleaned and tidied already.(现在完成时的被动语态)
How could this kind of cakes be made in your home?(含情态动词的被动语态)
That is a day never to be forgotten.(动词不定式的被动语态)
3. 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 plant trees in the park.
I didn't know if she was going to come here.
4. be+to do，表示"按计划安排将要做某事"。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.
be动词的意思是“是”，
I am fine, thank you.
Are you fond of the music? be fond of 是：喜欢的意思
He is my teacher.
We are good friends.

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“Be”除了原形的“be”之外，还有另外七种形式：am, is, are, been, being, was, were
【当主动词时，“be”在性质上属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作补足语(The Complement)。例如：
1. The man is a science teacher. 这个男子是一位科学...

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“Be”除了原形的“be”之外，还有另外七种形式：am, is, are, been, being, was, were
【当主动词时，“be”在性质上属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作补足语(The Complement)。例如：
1. The man is a science teacher. 这个男子是一位科学教师
2. Mary's new dresses are colourful. 玛丽的新衣服色彩鲜艳
陈述句，可以变成疑问句，方法简单，把主语和“be”或助动词对换位置即可：
5. Is the man a science teacher?
6. Are Mary's new dresses colourful?
【当“be”要在祈使句中出现时，它必须借重助动词“do”或“don't”之助，如：
9. Don't be silly!
10. Do be obedient!
11. Don't be a fool!
【“Be”有两种缩写法，如下：
12. He's not...../He isn't....
13. You're not...../You aren't...
【但“am + not”的缩写法只有一个：
14. I'm not.
【be”作助动词时】
【1.】“Be + 现在分词”以组成进行式时态(Continuous Tenses)，如：
15. Tony's maid is washing his new car.
16. The children are playing in the field.
【2.】“Be + 过去分词”以组成被动语态(The Passive Voice),如：
19. Her money in the drawer was stolen.
20. A number of good jobs are taken up byforeigners.

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be动词紧跟在主语后面，I与am搭配，you/we/they等复数的主语（比如my parents lily and lucy)与are搭配〔you不管翻译成“你”还是“你们”都与are搭配〕，he/she/it等单三人称（比如 Mr.lee Jack)作主语时，谓语用is
eg:
I am a student.〔后加名词〕
You are playing compute...

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be动词紧跟在主语后面，I与am搭配，you/we/they等复数的主语（比如my parents lily and lucy)与are搭配〔you不管翻译成“你”还是“你们”都与are搭配〕，he/she/it等单三人称（比如 Mr.lee Jack)作主语时，谓语用is
eg:
I am a student.〔后加名词〕
You are playing computer.〔后加动词〕
He/Lucy is sad.〔后加形容词〕

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