四、使用过去分词
例： 1 She walked out of the lab and many students followed her。一般
Followed by many students, she walked out of the lab。特殊
2 Once it is seen, it can never be forgotten。一般
Once seen, it can never be forgotten. 特殊
五、使用 v- ing
1 When he arrives，please give me an e-mail。一般
On arriving /his arrival ,please give me an e-mail。特殊
2 If the weather permits ,I will come tomorrow。一般
I will come tomorrow, weather permitting. 。特殊
六、使用名词性从句
1.It disappointed everybody that
he didn’t turn up。一般
The fact that he did n’ t turn up
disappointed everybody。特殊
2.I happened to have met him。一般
It happened that I had met him. 特殊
3.To his surprise, the little girl knows so many things。一般
What surprises him is that the little girl knows so many things. 特殊
