2. 过去分词作让步状语时，一般转换为although， though或even if等引导的让步状语从句。
3. It is rather difficult to make friends with him， but his friends， __________ is more true than others.
4. __________ by his grandparents made Mike not used to living with his parents.
5. __________ ， he continued to walk. （hesitate）
7. ed, he lowered his head.当他被问问题的时候,他低下了头。2过去分词作原因状语相当于一个原因状语从句。例如：Frightened (=Because / As she was frightened) by the tiger, the girl didnt dare to sleep alone.因为害怕老虎, 这个女孩不敢单独睡觉。3过去分词作条件状语相当于一个条件状语从句。例如：Grown (If these seeds are grown) in rich soil, these seeds can grow fast.如果种在肥沃的土壤里，这些种子能长得很快。Gi
8. Hesitating for a moment
9. __________， they took a rest. （classify）
11. __________twice， the postman refused to deliver our letters unless we chained our dog.
12. __________ from the top of the tower， the south of the mountain is a sea of trees.
13. ― Who should be responsible for the accident？
14. teacher，the girl began to cry. 被老师责怪，女孩哭了起来。(scolded表示被动且动作已完成) 考例1_ into use in April 2000， the hotline was meant for residents reporting water and heating supply breakdowns.(2005年上海卷) A. Put B. Putting C. Having put D. Being put 解析选A。主句主语the hotline与put into use逻辑上是被动关系，排除BC；D项表示正在进行的被动与句子意思不
15. Badly wounded in the leg
17. 过去分词作原因状语时，可转换为as， since或because等引导的原因状语从句。
18. __________ of stealing money from the bank， he was questioned by the police.
19. Though disappointed at the result
22. 过去分词作状语的位置.过去分词可放在主句前作句首状语，后面有逗号与主句隔开;也可放在主句后面，前面有逗号与主句隔开。He stood there silently,moved to tears. = Moved to tears,he stood there silently.他静静地站在那里，被感动得热泪盈眶。
23. 与状语从句的变换 过去分词作状语在功能上相当于状语从句，在句中表示时间原因条件方式伴随让步等。所以经常会遇到过去分词前带有once， when， while， if， as if， even if， though， unless等连词，我们将这种结构看成在连词与过去分词之间省略了与主句相同的主语和系动词be。例如： Once published， this book will be popular with the students.=Once it is published，this book will be popular with the students.这本书一旦出版，它将会受到学生
25. __________ ， he has to stay in bed. （wound）
26. 过去分词作条件状语时，可转换为if， once或
27. 作时间状语，通常在句首，但有时句末，有时置于主语和谓语之间。
28. Having classified the books
30. Our friendship is nothing __________ with yours.
32. 过去分词作方式状语时，如有连词as if就转换为as if引导的方式状语从句：若无连词，则转换为并列句。
33. __________ accoring to the directions， this kind of medicine has no side effect.
34. __________ ， she still accepted it without complaint. （disappoint）
35. No one can walk the wire in the air without a bit of fear unless __________ very young.
37. 们的欢迎。(过去分词作时间状语。注：分词前once可省略) 考例1_ with the size of the whole earth， the biggest ocean does not seem big at all. A. Compare B. When compared C. Comparing D. When comparing 解析选B。主句中的 the biggest ocean与compare形成逻辑上的被动关系，因此要用过去分词。 考例2No matter how frequently _， the works of Beethoven still attrac
38. 过去分词作时间状语时，可转换为when， while或after等引导的时间状语从句。
39. ven (If we were given) more time, we could do it better.如果给我们更多时间的话，我们可以做得更好。注意：此句中的given在许多语法书中作为介词处理。4过去分词作让步状语相当于一个让步状语从句。例如：Left (Although he was left) at home, John didnt feel afraid at all.虽然John被单独留在房间里, 他一点都不害怕。5过去分词作状语表示伴随动作或状态。例如：The teacher entered the classroom, (and he was) followed by
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