高考英语语法点详解：过去分词的用法_高考语法

　　Done in a hurry, his homework was full of mistakes.他匆忙做的作业错误百出.

　　2.作时间状语.

　　相当于when引导的状语从句.如果两个动作同时发生,可在分词前用when, while等使其时间意义更明确.如:

　　When heated, water can be changed into steam.水加热后可以变成蒸汽.

　　注意:作时间状语时,过去分词如果同时表被动和动作完成,常可换用现在分词的被动完成式;过去分词如果只表被动,不表完成,则不可与现在分词的被动完成式换用.如:

　　Discussed(Having been discussed) many times, the problems were settled at last.在讨论了多次之后,问题终于解决了.(过去分词既表被动又表完成)

　　Seen from the hill, the park looks very beautiful.从山上看这个公园非常漂亮.(过去分词只表被动)

　　3.作条件和假设状语.

　　相当于if, unless引导的从句.如:

　　Given more attention(If they had been given more attention), the cabbages could have grown better.如果再精心一些,这些大白菜还可以长得更好.

　　Compared with you, we still have a long way to go.和你相比,我们还有很大的差距.

　　4.作方式或伴随情况状语.

　　The hunter left his house , followed by his dog.猎人离开了屋子,后面跟着他的狗.

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