学习知识|be动词怎么用,什么情况下用be动词( 三 )


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.
期望你的采纳 , 谢谢
be动词应该怎么用呢? 作为系动词(也叫连系动词 , link verb)的be , 是英语学习者接触最早的用法 , 而且其用法也很多 。 其基本含义为“是” , 基本用法结构为“主语 be 表语” , 也就是我们常说的主系表结构 , 其中的表语一般都由名词、形容词、数词或表地点、时间等的短语来充当 。
1、be的时态变化
系动词be会有一般现在时、一般过去时、一般将来时、现在完成时、过去完成时等的时态变化 。 如:
(1)He isa student.
(2)They werein the park yesterday.
2、be与情态动词的连用
其用法为:情态动词 系动词be原形 。 如:
(1)It must be Lucy's book. Her name is on the cover.
(2)It can be very difficult for us to memorize too many words within such a short time.

拓展资料:
助动词be能够构成特殊句型 。 如:
1、be going to do
be going to do表示“打算或将要” 。 如:
(1)He isgoing to visit us next week.
(2)It isgoing to rain soon.
2、be about to do
be about to do表示“刚要 , 即将” 。
与be going to do表“将要”不同的是 , be about to do表示的是说完话后马上就要去做或是短期内马上就要去做 。 如:The plane isabout to take off in five minutes' time.

be动词怎么用 一、用法

aux. (助动词)
be用作助动词时可与动词的现在分词连用,构成进行时态,也可与及物动词的过去分词连用,构成被动结构 。
be可以和动词不定式连用 , 有以下几点意义:
①表示计划或安排要发生的事或打算要做的事 , 不定式可用被动式 , 在was或were后用不定式的完成式可表示“本来打算…”;

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