United, we stand; divided, we fall. 非谓语动词：过去分词 过去分词(短语）作状语 过去分词表示完成或被动，作状语时，表示动作发生的背景或者情况，在意义上相当于一个状语从句，其省略的主语（逻辑主语）是主句的主语，且与主语之间存在被动关系。过去分词作状语可以表示时间、条件、方式、原因、让步等。过去分词的否定式是将 not 放在其前面。 一、过去分词作状语时的具体用法： 1) 过去分词作时间状语时，相当于一个时间状语从句。有时过去分词前可加连词when 或while 来强调时间概念. 例：1. Asked (When he was asked) what had happened, his face turned red. 当他被问及发生了什么的时候，他的脸红了。 2. When heated (When it is heated), water changes into steam. 当加热时，水变成水蒸气。 3.Told that his mother was ill（When he was told that his mother was illl), Li Lei hurried home quickly. 李蕾得知母亲生病了时，马上赶回了家。 4. Seen from the moon(When it is seen from the moon) , the earth looks green. 从月亮上看时，地球是绿色。 2) 过去分词作原因状语时，相当于一个由 as, since, because 等词引导的原因状语从句。 例：1. Deeply (Because they were) moved by the movie, the children began to cry. 由于被电影深深地感动，孩子们哭了起来。 2. Frightened (Because she was frightened) by the horror movie, the girl didn't dare to sleep alone. 因为被惊悚电影吓坏了，这个女孩不敢单独睡觉。 3. Caught in a heavy rain (Because he was caught in a...), he was all wet. 4. Satisfied with what he did (Because the teacher was satisfied with...), the teacher praised him in class. 由于老师对他所做的事情很满意，于是在班上表扬了他。 3) 过去分词作条件状语时，通常放在句子的前面，相当于if, unless 等引导的条件状语从句。 United, we stand; divided, we fall. 例：1. Compared with you (If we are compared) , we still have a long way to go. 和你们比起来，我们还有很长的一段路要走。 2. Grown (If these seeds are grown) in rich soil, these seeds can grow ...
