2018-2019学年人教新课标高二英语必修五Unit 1 Great scientists《过去分词作表语和定语》知识重点梳理讲解

过去分词作表语和定语 概念引入 今天我们要学习过去分词作表语和定语的用法。先看下面这些句子： 1. But he became inspired when he thought about helping ordinary people exposed to cholera. (inspired过去分词作表语；exposed过去分词作定语) 2. So many thousands of terrified people died every time there was an outbreak. (terrified 过去分词作定语) 3. He became interested in two theories that possibly explained how cholera killed people. (interested 过去分词作表语) 4. From the stomach the disease quickly attacked the body and soon the affected person died. (affected 过去分词作定语) 5. He was determined to find out why. （determined 过去分词作表语） 6. He found that it came from the river polluted by the dirty water from London. (polluted 过去分词作定语) 上面句子中的黑体词都是过去分词，句1（inspired）、句3、句5中的三个词跟在系动词became、was后作表语；而句1（exposed）、句2、句4、句6中的四个词放在名词前或后修饰名词，作定语。那么过去分词是什么？有什么作用？我们将在本单元和下两个单元中与同学们一起学习。 语法讲解 英语中动词如果不作谓语时叫非谓语动词。非谓语动词分为：不定式（to do）、动词-ing形式（doing）和过去分词（done）。 动词-ing形式可分为现在分词和动名词：现在分词强调动作，如a sleeping boy中的sleeping强调“睡觉”这一动作，而且此动作正在进行，与所修饰词boy有逻辑上的主谓关系（即sleeping的动作是boy做的），因此是现在分词作定