unit5The_Power_of_Nature课件28(人教版选修6).ppt

人教课标版 高二 选修6 Unit 5;Grammar ; Review the usage of –ing form below. Examine the sentences and discuss in what way the structures similar to each other and in what way they are different.;Looking carefully at the ground, I made my way to the edge of the crater.;小结-ing 形式的用法 ;用法;用法;用法;用法;2. –ing形式的完成式;例句： (Having been) written in haste, the book has some faults. 这本书因仓促写成，所以有些缺憾。;分词 (短语) 作状语时, 其逻辑主语必须与句子的主语一致。如果不一致，必须用独立主格结构来表示，也就是在分词前面加上它的逻辑主语。 ; My wife had a long talk with Sally, explaining why she didn’t want the children to play together. 我妻子与莎莉谈了很长时间, 解释她为什么不想让孩子们在一起玩。;(现在分词explaining是句子主语my wife做的动作,它们之间是主动关系, 即explaining的逻辑主语，就是句子的主语my wife 。)The train having gone, we had to wait another day.（the train逻辑主语 + having gone 即为独立主格结构）;分词短语做状语时，前面可以加上连词或介词，但是分词短语和句子之间不能用并列连词(如but，and)，因为并列连词接的是两个并列成分，而分词短语只是全句的一个状语部分，分词和主句之间可用逗号。;例如:误: Having been told many times, but he still couldn’t understand it.正: He was told many times, but he still couldn’t understand it. 或 Having been told many times, he still couldn’t understand it.;-ing的一般式和完成式现在分词都可以表示先后接连发生的动作。在可能引起误解的场合应该用完成式现在分词表示先发生的动作。;例如: Opening the drawer，he took out his wallet. (=He opened the drawer and took out his wallet.) 他打开抽屉，拿出钱包。;Coming into the room, he put down his bag. (=He came into the room and put down his bag.) 他走进房间，放下提包。; Having brushed his teeth, Mr. Brown came downstairs for breakfast. 布朗先生刷过牙, 就下楼来吃早饭。(此句如写成: Brushing his teeth, Mr. Brown came downstairs for breakfast. 可能指 “边刷牙, 边下楼 。) ;分词的否定形式是在分词短语前面加上 not, never等否定词构成。;例如:Not fearing the fire, the child touched and got a finger burnt. 小孩儿不知道 怕火，用手去摸，把手指烫了。Not knowing how to find the subway, I asked a policeman for help. 我不知怎样找到地铁，就去找警察帮忙。 ;I. 每空填一词，使该句与所给句子的意思相同。 1. Because he was ill, he didn’t go to school. _____ __, he didn’t go to school. 2. When she was walking along the street one day, she met an old friend of hers. _______ ______ the street one day, she met a