【当做主动词时，“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： The man is a science teacher. 这个男子是一位科学教师。 Mary's new dresses are colourful. 玛丽的新衣服色彩鲜艳。 I havebeen there before. 我以前去过那里。 My motheris in the kitchen now. 我妈妈现在在厨房里。
★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： Is the man a science teacher? Are Mary's new dresses colourful? Have I been there before? Is mother in the kitchen now? ★当“be”要在祈使句中出现时，陈述句可借助助动词“do”，否定句必须在前加上助动词“don't”，如： Don't be silly! Do be obedient! Be careful! Don'tbe a fool! ★“Be”有两种缩写法，如下： He's not...../He isn't.... You're not...../You aren't... ★但“am + not”的缩写法只有一个： 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
【1.】“Be + 现在分词”以组成进行式时态(Continuous Tenses)，如： Tony's maidis washing his new car. The children are playing in the field. Samuel was eating when I came in. We have been living here since 1959. 【2.】“事/物人 +Be + 过去分词”以组成被动语态(The Passive Voice),如： Her money in the drawer was stolen A number of good jobs are taken up by foreigners David studied in Taiwan but hasbeen trained as a language lecturer in America Can all the wonderful birds be found in our Bird Park The disobedient boywas told to stand out- side the classroom Steps are being taken to reduce traffic con- gestion during peak hours Dishonest students will be immediately dealt with
1. This is a book.
2. That is a pen.
3. What is this?
4. It is a ruler.
5. What is the weather like today?
6. It is sunny.
7. It was rainy yesterday.
8. It will be cold tomorrow.
9. Where are you from?
10. I am from America.
11. How are you?
12. I am fine.
13. Are you a student?
14. No, I am not a student.
15. What is your father?
16. He is a doctor.
17. What is your mother?
18. She is a nurse.
19. What are you doing here?
20. I am making sentences.