Unit 13 People Period Three　Grammar 课件（北师大版必修5，课标通用）.ppt

Unit 13 People Period Three　Grammar 课件（北师大版必修5，课标通用） 过去分词及情态动词表猜测 一、过去分词 1．过去分词作定语 单个的过去分词作定语往往置于被修饰词的前面，通常为及物动词的过去分词形式，表示被动和完成意义。 单个的过去分词作定语时偶尔也可置于被修饰词的后面，但大多数作后置定语的过去分词形式是短语形式，作用相当于定语从句。 We only sell used books in our bookstore. 我们的书店只卖用过的书。 The lost time can never be found again. 失去的时间将永远找不回来。 Things seen are mightier than things heard. 眼见为实，耳听为虚。 2．过去分词作表语 动词的过去分词形式作表语表示主语的某种性质或状态。 All the people present were already seated，waiting for the conference to open.所有到场的人都已入座，等着会议开始。 All of us were moved to tears at the sorrowful story. 听到那个悲伤的故事，我们都感动得流下泪来。 Most middle school students are interested in pop stars and NBA star players. 大多数中学生对流行歌星和NBA明星感兴趣。 3．过去分词作宾语补足语 作宾语补足语的动词的过去分词形式多来自及物动词，说明宾语的状态或性质，与宾语一起构成复合宾语。此时它前面的宾语就是其逻辑宾语。 If you want to make yourself respected，you are above all to respect others.若要人敬己，先要己敬人。 When will you go to the hospital and have your tooth examined？你什么时候去医院检查你的牙齿？ When you are making a speech，you should speak louder to make yourself heard. 当你在作报告时，你应该讲得声音大点，让别人听清楚。 4．过去分词作状语 过去分词和-ing 分词作状语一样，也可以表示时间、原因、条件、让步、方式或伴随情况等。 (1)表时间，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。 Seen from the top of the hill，the city looked like a big garden. 从山顶上看，这个城市就像一个大花园。 Accepted by the Party，he decided to devote his life to the cause of the Party. 入党以后，他决定献身于党的事业。 (2)表原因，相当于一个原因状语从句。 Deeply moved by the story，the excited people stopped quarrelling with each other. 激动的人们被那个故事深深地感动了，停止了争吵。 Encouraged by the speech，the young people made up their minds to take up the struggle. 受到了讲演的鼓舞，年轻人决定开始进行这场斗争。 (3)表条件，相当于一个条件状语从句，有时过去分词前可用if等词。 Given another chance，he will do better. 再给他一次机会，他会做得更好。 Compared with your brother，you should make greater efforts to study English. 和你哥哥相比，你应该更加努力学习英语。 If heated，water can turn into steam. 水如果被加热会变成水蒸气。 (4)表让步，相当于一个though/ although 引导的让步状语从句。 Exhausted by the running，they went on running after the robber.尽管已经跑得筋疲力尽，他们还是继续追赶那个强盗。 Laughed at by many people，he continued his study. 尽管被许多人嘲笑，他还是继续他的研究。 (5)表方式或伴随情况。 The old man went int