第1个回答 2019-07-01
be动词,意思和用法很多,一般的意思是:是。
此种用法,有多种变化形式:is,am,are,was,were,being,been,to be另外,be动词还有成为的意思。根据句子中不同的人称、数和时间,型态,应该选择相应的be动词。
be动词的用法:
1、如果是一般过去时,就用was/were
2、如果是一般现在时,就用am/is/are
3、如果是一般将来时,就用will be
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4、一般过去时:第一人称单数和第三人称的单数形式,则用was,第一人称和第二人称、第三人称的复数,则用were,第二人称单数也用were。
5、一般现在时:第一人称单数形式,用am,第三人称单数形式,用is,第一人称复数、第二人称复数、第三人称的复数形式,则用are,第二人称单数也用are。
6、一般将来时:will be,will在一般情况下相当于be going to,表示将要做什么,两者之间有细微差别will更口语化点,be going to表示有可能马上要着手去做的事情。
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第2个回答 推荐于2017-09-02
am,is,are=be动词.因为它们的原型是be.
作用: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!
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.本回答被提问者采纳
第3个回答 2018-07-26
英语的“be”是个特殊动词;有些语言,如马来文等,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.
be可以用作连系动词,中心词义是“是”,句型为“主+系+表”结构。be的形式常用am, is, are(现在式);was, were(过去式);will/can/may/must be(助动词/情态动词+原形);have/has/had been(助动词+过去分词)等。如:
To help animals is helping people. (一般现在时)
帮助动物就是帮助人类。本回答被网友采纳