Unit 2 Wildlife Protection Discovering Useful Structures 课件-2024-2025学年高一英语人教版（2019）必修第二册

Discovering Useful Structures Wildlife Protection The structure of present continuous passive voice What do you know about wildlife protection? Our planet’s wildlife is dying out at an alarming rate. Between 150 and 200 species are becoming extinct every day. African elephants are being hunted. Much is being done to protect wildlife. What is being done to help them? What measures are being taken to help them? Lead in Lead in 3 现在进行时的被动语态 am/is/are＋being＋done What can you find? Lead in Lead in Simple（一般） Continuous（进行） Present （现在） do/does Tense is/am/are doing Perfect（完成） Perfect continuous（完成） Past （过去） Future （过去） The past future （过去将来） have/has done have/has been doing did was/were doing had done Had been doing will/shall do will/shall be doing will/shall have done will/shall have been doing should/would do should/would be doing should/would have done should/would have been doing 5 表示“某人/事此时此刻正在被…”，主语是动作的承受者, 表示说话时或现阶段某个被动的动作正在进行。 1. Pandas are being protected in Wolong National Reserve. 2. A modern school is being built for the students these months. 3. A Christmas party is being held tonight. 4. Tom is always being praised by the teacher. 说话时正在进行的被动动作 现阶段正在进行的被动动作 按计划或安排将要进行的一个被动动作 经常的被动行为 一、现在进行时的被动语态的定义 6 7 It is reported that the water in the lake is not being protected now. 据报道，这个湖里的水现在没有得到保护。 Are the babies being taken care of by this nurse? 这些婴儿正由这个护士照看吗？ Who is being trained for the coming English speech contest? 为了即将举行的英语演讲比赛，谁正接受训练？ 肯定句 否定句 一般疑问句 特殊疑问句 二、现在进行时的被动语态的结构 主语＋be(am/is/are) ＋being done 主语＋be(am/is/are) ＋not＋ being done be(am/is/are) ＋主语＋being done 特殊疑问词＋be(am/is/are) ＋主语＋being done Change the sentences into the passive form. Active voice (主动语态)  Passive form (被动语态)  (1) I take a book. (1) The book is taken by me. (2) He waters the flowers every day. (2) The flowers are watered by him every day. (3) The famers don't grow apples on the farm. (3) Apples are not grown by the farmers on the farm. (4) Can we put our bikes here? (4) Can our bike be put here? 8 Books … are being … read … by students. … African elephants are being hunted. Object am/is/are being past participle (by +Subject) + + +  Present continuous tense (现在进行时)   Present continuous passive tense (现在进行时被动语态)  (1) I am reading a book. (1) The book is being read by me. (2) They are hunting a dear. (2) The dear is being hunt by them. (3) Tom is playing the guitar. (3) The guitar is being played by Tom. 9 10 1．不可遗漏being 现在进行时的被动语态中，be为第一助动词，being为第二助动词，缺一不可，且位置不可互换。此结构若缺少being，则就成为一般现在时的被动语态或系表结构。试比较： The report is being written by the best student.报告正在由一名最好的学生写着。 The report is well written.这个报告写得很好。(系表结构) 2．不可遗漏介词 take care of，look after，talk about，think of等动词短语用于现在进行时的被动语态时，其中的介词不可省略。 Look！The children are being taken care of by their aunt. 瞧！那些孩子正由他们的姨妈照看着。 注意事项 What is being done to help them? What measures are being taken to help them? Wise men learn by other men's mistakes; fools by their own 形式 结构 肯定式 主语＋am/is/are＋being done. 否定式 主语＋am/is/are not＋being done. 一般疑问式 am/is/are＋主语＋being done？ 特殊疑问式 疑问词＋am/is/are＋主语+being done？ 现在进行时被动语态的基本形式 Wise men learn by other men's mistakes; fools by their own eg： The house is being painted. （肯定式） The trees are not being watered. （否定式） Am I being watched over?（一般疑问式） How many bridges are being built in the village?（特殊疑问式） Wise men learn by other men's mistakes; fools by their own 一般疑问句 be(am/is/are) ＋主语＋being done 特殊疑问句 特殊疑问词＋be(am/is/are) ＋主语＋being done Are the bones of the animals being tested? Who is being questioned by the police right now? Wise men learn by other men's mistakes; fools by their own past Review time tense 时态 future present 一般过去时 过去进行时 一般现在时 现在进行时 一般将来时 现在完成时 过去完成时 will/shall be/do 现在完成进行时 am/is/are 或实义动词原型或三单+s am/is/are doing have/has done have/has been doing was/were 或实义动词过去式 was/were doing had done passive voice 被动语态 will/shall be done am/is/are done am/is/are being done have/has been done have/has been being done was/were done was/were being done had been done African elephants are being hunted. 2.What is being done to help them? 3.What measures are being taken to help them? 非洲大象正在被猎杀。 现在正在做些什么来帮助他们呢？ 现在正在采取哪些措施来帮助他们呢 Definition & Functions 定义&作用 Task 1: Observe the present continous passive voice and discuss its functions. Definition & Functions 定义&作用 (1) 现在进行时的被动语态，表示正在进行的被动动作发生在说话人说话时或现阶段。 (2) 现在进行时的被动语态的构成： be＋being＋done(过去分词); be being done中的be动词应随主语做相应的变化（am/is/are）。 注意：现在进行时的被动语态中不能漏掉being. Formation 形式 肯定句 否定句 一般疑问句 特殊疑问句 现在进行时的被动语态的主要形式有肯定式、否定式、疑问式。 主语＋am/is/are ＋being done 主语＋am/is/are ＋not＋being done Am/Is/Are + 主语＋ being done? 特殊疑问词 + am/is/are + 主语＋ being done? 1. reduce vt. 减少 Eg. It is reported that living spaces for wildlife are being reduced due to the cutting of trees. 据报道，由于砍伐树木，野生动物的生存空间正在减少。 Period 3 Discovering Useful Structures 【词汇精讲】 reduce 是及物动词，意为“减少”。 One of the most effective ways to reduce stress is to talk about feelings with someone you trust. 减少压力最有效的方式之一就是与你信任的人聊聊感受。 Period 3 Discovering Useful Structures 【词汇拓展】 reduce···by··· 把···减少了··· reduce···to···把···减少到···；把···变为某种状态 be reduced to 陷入某种境地 (to 为介词) Period 3 Discovering Useful Structures Eg. Though the price of the house has been reduced by 10% since 2017，we can′t afford it either. 尽管从2017年以来房价下降了10%，我们还是买不起。 His life in the big city was hard and finally he was reduced to begging in the streets. 他在大城市里的生活艰难，最后被迫在街头乞讨。 Period 3 Discovering Useful Structures $$