英語(yǔ)的“be”是個(gè)特別動(dòng)詞;有些語(yǔ)言，如中文和馬來(lái)文，并沒(méi)有“be”這樣的動(dòng)詞。

“Be”除了原形的“be”之外，還有另外七種形式：am, is, are, been, being, was, were.

在句子中，“be”可以是主動(dòng)詞(The Principal Verb)或助動(dòng)詞(The Auxiliary Verb).

當(dāng)主動(dòng)詞時(shí)，“be”在性質(zhì)上屬于接系動(dòng)詞(The Linking Verb), 后面要有名詞、形容詞、地方副詞或短語(yǔ)作補(bǔ)足語(yǔ)(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.

這四個(gè)都是陳述句，可以變成疑問(wèn)句，方法簡(jiǎn)單，把主語(yǔ)和“be”或助動(dòng)詞對(duì)換位置即可：

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?

當(dāng)“be”要在祈使句中出現(xiàn)時(shí)，它必須借重助動(dòng)詞“do”或“don’t”之助，如：

9. Don’t be silly!

10. Do be obedient!

11. Don’t be a fool!

“Be”有兩種縮寫(xiě)法，如下：

12. He’s not……/He isn’t……

13. You’re not……/You aren’t……

但“am + not”的縮寫(xiě)法只有一個(gè)：

14. I’m not.

有人用“ain’t”, 但這并不是標(biāo)準(zhǔn)英語(yǔ)。

談過(guò)了“be”作主動(dòng)詞的功能，現(xiàn)在看看“be”作助動(dòng)詞時(shí)，有些什么用法：

1.“Be + 現(xiàn)在分詞”以組成進(jìn)行式時(shí)態(tài)(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 + 過(guò)去分詞”以組成被動(dòng)語(yǔ)態(tài)(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.

從上面例子看，“be”這動(dòng)詞外貌平凡，但內(nèi)涵豐厚。如果沒(méi)有“be”，補(bǔ)足語(yǔ)的橋梁斷了。如果沒(méi)有“be”,何來(lái)進(jìn)行式時(shí)態(tài)和被動(dòng)語(yǔ)態(tài)?缺了這幾樣重要的句式，英語(yǔ)還像英語(yǔ)嗎?