以下是过去分词的用法： 过去分词表示“被动和完成”(不及物动词的过去分词不表示被动，只表示完成)。分词可以有自己的状语、宾语或主语等。 1)分词作状语分词在句子中作状语，可以表示时间、条件、原因、结果、让步、伴随等。分词做状语时，它的逻辑主语与句子的主语一致。作状语的分词相当于一个状语从句。【例如】 Accompanied by his friend, he went to the railway station. 2)“while ( when, once, until, if , though等连词)＋过去分词”结构作状语时，有时可以在分词前加while，when, once, although, until, if等连词。【例如】 Once recovered, he threw himselfsintoshis work and made every effort to do it well. 3)分词作定语分词作定语时，单个的分词通常放在被修饰的名词之前，分词短语一般置于所修饰的中心词后面。过去分词修饰承受该动作的名词(即与名词是动宾关系)。【例如】 We will go on with our experiment as soon as we get the added fund. We can see the part of the moon lighted by sunlight. 4)过去分词可以在allow, ask, consider, desire, expect, feel, find, get, have, hear, imagine, keep, like, make, observe, order, permit, prefer, remember, request, require, see, urge动词等后面作宾语补足语。【例如】 After my encounter with her, I found myself greatly shaken.You should keep her informed of what is going on here.The teacher expected the students well prepared for the examination. 5)分词作表语分词作表语通常看作形容词来用。现在分词表示主语的性质，而且主语多为物；过去分词表示主语的感受或状态，主语多为人。【例如】 The film“Pearl Harbor”is really exciting. I am excited about it.