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Be动词用法

时间:2011-11-03 01:10 来源:北纬森教育

be动词的用法:

英语的be是个特别动词;有些语言,如中文和马来文,并没有be这样的动词。 Be除了原形的be之外,还有另

外七种形式:am, is, are, been, being, was, were. 在句子中,be可以是主动(The Principal Verb)或助动词(The

Auxiliary Verb). 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

作补足语(The Complement)

例如:

    1. The man is a science teacher.

    2. Mary's new dresses are colourful.

    3. I have been there before.

    4. Mother is in the kitchen now.

这四个都是陈述句,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?

    7. Have I been there before?

    8. Is mother in the kitchen now?

be要在祈使句中出现时,它必须借重助动词dodon'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... 

am + not的缩写法只有一个:

    14. I'm not.

有人用ain't, 但这并不是标准英语。 谈过了be作主动词的功能,现在看看be作助动词时,有些什么用法:

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.

    17. Samuel was eating when I came in.

    18. We have been living here since 1959.

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.

    21. David studied in Taiwan but has been trained as a language lecturer in America.

    22. Can all the wonderful birds be found in our Bird Park?

    23. The disobedient boy was told to stand out- side the classroom.

    24. Steps are being taken to reduce traffic con- gestion during peak hours.

    25. Dishonest students will be immediately dealt with.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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