Unit 2 Section Ⅱ　Discovering Useful Structures 同步课件 （新教材）人教版（2019）必修第二册.pptx

1、Unit 2 Wildlife Protection Section Discovering Useful Structures 走近新课走近新课一起感知一起感知 语法探究语法探究一起思考一起思考 走近新课走近新课一起感知一起感知 阅读下列句子阅读下列句子,归纳画线部分的时态和语态归纳画线部分的时态和语态 1.What is being done to help them? 2.What measures are being taken to help them? 3.I know that they are being hunted and their habitats are becomi

2、ng smaller. 4.They are being hunted,illegally,for their valuable fur. 5.Much is being done to protect wildlife. 时态和语态时态和语态:_ 现在进行时的被动语态现在进行时的被动语态 语法探究语法探究一起思考一起思考 词汇讲解词汇讲解 It is reported that living spaces for wildlife are being reduced due to the cutting of trees.(page 18) 据报道据报道,因为树木的砍伐因为树木的砍伐,野生生

3、物的生活空间正在被减少。野生生物的生活空间正在被减少。 (一一)reduce vt.减少减少 They reduced the price by 500 yuan. 他们把价格降低了他们把价格降低了500元。元。 They reduced the expenses to 60 percent. 他们将开支压缩到了他们将开支压缩到了60%。 Listening to some light music can reduce anxiety. 听一点轻音乐能减少焦虑。听一点轻音乐能减少焦虑。 One of the most effective ways to reduce stress is to

4、talk about feeling with someone you trust. 一种最有效的减压方法就是和你觉得信任的人谈谈你的想法。一种最有效的减压方法就是和你觉得信任的人谈谈你的想法。 【合作探究】【合作探究】 说一说说一说 勤归纳勤归纳 reduce sth to. 减少减少(降低、缩小降低、缩小)到到 reduce sth by. 减少减少(降低、缩小降低、缩小)了了 (二二)due adj. 由于由于;因为因为 The restaurants success was due largely to its new manager. 饭店的成功主要归功于新的经理。饭店的成功主要归功

5、于新的经理。 Most of the problems were due to human errors. 大多数问题都是人为错误造成的。大多数问题都是人为错误造成的。 【合作探究】【合作探究】 说一说说一说 勤归纳勤归纳 due to 由于由于;因为因为 记一记记一记 长知识长知识 due to 还可以表示还可以表示“预期预期”。 The meeting is due to start at three. 会议定于三点钟开始。会议定于三点钟开始。 【即学即用】【即学即用】 单句语法填空单句语法填空 (1)He came to school late due _the heavy rain.

6、(2)She reduced her weight _5 kilograms. (3)This is the only way _(reduce) the overuse of water in students bathrooms. to by to reduce 完成句子完成句子 (4)我们希望他们会把租金降低一点。我们希望他们会把租金降低一点。 We were hoping that they would _a little. (5)雇员人数已从雇员人数已从40人减少到了人减少到了25人。人。 The number of employees has been _40 _25. reduc

7、e the rent reduced from to 翻译句子翻译句子 (6)Her baby is due next month. (7)The project stopped due to a lack of funds. 她的宝宝下个月就要出生了她的宝宝下个月就要出生了。 因为缺少资金因为缺少资金,这个项目停工了这个项目停工了。 语法讲解语法讲解 知识脉络知识脉络 语法精讲语法精讲 一、构成一、构成 形式形式 结构结构 肯定式肯定式 be(am,is,are)+being+done 否定式否定式 be(am,is,are)+not+being+done 一般疑问式一般疑问式 Be(Am,

8、Is,Are)+主语主语+being+done? 特殊疑问式特殊疑问式 特殊疑问词特殊疑问词+be(am,is,are)+主语主语 +being+done? The film is being shown in the small villages these days. 如今这部影片正在这几个小村子里上演。如今这部影片正在这几个小村子里上演。 The plan is not being discussed at the meeting now. 会议上现在没有讨论这个计划。会议上现在没有讨论这个计划。 Are these flowers being watered now? 现在有人在给这些

9、花浇水吗现在有人在给这些花浇水吗? Which hotel are you being served in now? 现在你现在你(们们)在哪个宾馆里接受招待在哪个宾馆里接受招待? 二、用法二、用法 1.表示此时此刻正在进行的被动动作。表示此时此刻正在进行的被动动作。 The new plan is being discussed now. 这个新计划现在正在被讨论。这个新计划现在正在被讨论。 2.表示现阶段正在进行的被动动作表示现阶段正在进行的被动动作,但该动作不一定此时此但该动作不一定此时此 刻发生。刻发生。 Several new roads are being built in the

10、 city. 这个城市有几条新公路正在建设中。这个城市有几条新公路正在建设中。 3.表示一种经常性的被动行为表示一种经常性的被动行为,常和常和always,constantly,often 等副词连用等副词连用,往往带有夸奖、羡慕、埋怨、讨厌等感情色彩。往往带有夸奖、羡慕、埋怨、讨厌等感情色彩。 Tom is always being praised by his teacher. 汤姆总受到老师的表扬。汤姆总受到老师的表扬。 三、注意要点三、注意要点 1.不可遗漏不可遗漏being。 现在进行时的被动语态表示说话时正在进行的一个被动的现在进行时的被动语态表示说话时正在进行的一个被动的 动作动

11、作,如果我们把如果我们把being漏掉漏掉,即成为一般现在时的被动语态或即成为一般现在时的被动语态或 系表结构。系表结构。 Look!The children are being taken care of by their aunt. 瞧瞧!那些孩子正由他们的姑妈照看着。那些孩子正由他们的姑妈照看着。 Children are taken good care of at school. 孩子们在学校被照看得很好。孩子们在学校被照看得很好。(指通常情况指通常情况) 2.某些表示某些表示“状态、心理活动、存在状态、心理活动、存在”等的动词等的动词,如如 have,want,need,love等一

12、般不用现在进行时的被动语态等一般不用现在进行时的被动语态,而常而常 用一般现在时的被动语态。用一般现在时的被动语态。 With the population increasing,more land is needed(need). 随着人口的增长随着人口的增长,需要更多的土地需要更多的土地。 3.“be+under/in.+n.”可表示现在进行时的被动意义。可表示现在进行时的被动意义。 The problem is under discussion at the meeting.= The problem is being discussed at the meeting. 正在会议上讨论这

13、个问题。正在会议上讨论这个问题。 This lift is in use.=This lift is being used. 这部电梯正在使用中。这部电梯正在使用中。 【即学即用】【即学即用】 单句语法填空单句语法填空 (1)The injured footballer _(treat) in the hospital now. (2)A high-tech exhibition _(hold) in the National Museum now.Lets go and visit it. (3)Why is the road so crowded? The two new undergro

14、und lines _(build). is being treated is being held are being built (4)The water supply has been cut off temporarily because the workers _(repair) one of the main pipes. (5)They are living with their parents for the moment because their own house _(rebuild). are repairing is being rebuilt 把下列句子改为被动语态

15、把下列句子改为被动语态 (6)The workers are repairing the bridge. (7)The students are cleaning the classroom. (8)Scientists are studying the disease. (9)One of the best students is writing the report. The bridge is being repaired by the workers. The classroom is being cleaned by the students. The disease is being studied by scientists. The report is being written by one of the best students.