be动词怎么用,be动词的用法以及规则

发布时间:2020-07-10 19:03:41

be动词怎么用,be动词的用法以及规则

网友回答

be是一个连系动词,它有自己不同的形式
  现在时:be 进行时:being 过去时e79fa5e98193e59b9ee7ad9431333332636362:was/were 过去分词:been
  它的后面必须跟形容词或名词作表语,与之构成系表结构,充当句子的谓语。
  i am a student主语:i 谓语:am a student(系表结构)
  being是它的现在进行时态,一般不单独用,而是用于现在进行时的被动语态。(being+动词过去分词)
  the bike is being repaired.单车正在被修理中。
  it is being finished by him这正在被他完成中。
  been是它的过去分词,也不一般单独使用,而是用于现在完成时、过去完成时以及需要它的句子。
  i have been here for a long time.我已经到这里有一段时间了。
  至于你的问题,这与你想表达的意思有关。
  你的工作是什么?
  what do you do? what is your job?
  那么这里选用do和is有什么根据呢? http://www.qnr.cn/waiyu/
  第一句里面,第二个do是指你做什么,也就是你的工作,就是一个实义动词。按中文说,what you do已经足够了。可是英语里面就不行,必须跟一个助动词,也就是do.
  这里就有了一个结论:当句子中有动词时,我们就用助动词do或是does.如果没有动词时,我们就选用is或是are,也就是be

网友回答

亲爱的楼主:
  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)
  (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。)
  “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”可以是主动词(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、地方副词或短语作补足语(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?
  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!7a686964616fe78988e69d8331333332643233
  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.
  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.
  期望你的采纳,谢谢
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