Unit5　Grammar精品课件（新人教选修6）.ppt

新课标人教版课件系列;Period 4 grammar ;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;让步;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。 ;3. 使用-ing形式需注意的几个问题。 ;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 ;;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 childtouched 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. 我不知道怎 样找到地铁，就去找警察帮忙。 ; Ex: Rewrite the sentences using the presen or the perfect –ing form of the underlined verbs. The first two have done for you . ;1.When they heard about the volcano they ran down to the village. hearing about the volcano, they ran down to the village. ;2. After the scientists had studied the information they predicted that the lava would flow through the village. having studied the information, the scientists predicted that the