(课件网) Unit 2 Wildlife Protection Period 3 Discovering Useful Structures 课前自主预习 Let′s play 1. When Mary was playing by the woods，she happened to see a (袋鼠) come by. 2. The design of the bicycle has managed to _____ (减少) the effects of wind resistance. 一、单词拼写 kangaroo reduce 3. The students in our class often do volunteer work in the _____(街区). 4. I have never seen this kind of (昆虫) before. neighbourhood insects 考点精讲 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。 【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) 2. due adj.由于；因为；到期的；应付的；应有的 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。 常和to连用。 现在进行时的被动语态 【思维导图】 现在进行时的被动语态是中学英语语法中的一种非常重要的英语时态，它属于现在时态。 一、含义与结构 [合作探究] African elephants are being hunted. 非洲大象正在被猎杀。 What is being done to help them 现在可以做些什么来帮助它们呢？ What measures are being taken to help them 现在可以采取哪些措施来帮助它们呢？ [自主发现1] (1) 现在进行时的被动语态表示说话人说话时或现阶段 某事_____。 (2) 现在进行时的被动语态的构成： ① be＋being＋done (_____)； ②“be being done” 中的动词_____应随主语作相应的变化。 正在被做 过去分词 be [提醒] 现在进行时的被动语态中不能漏掉“_____”。 being [自主发现2] 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。它们的具体构成如下： (1)肯定式：主语＋_____＋_____ (2)否定式：主语＋_____＋_____＋_____. am/is/are being done am/is/are not being done (3) 疑问式：_____疑问式 [“Am/Is/Are＋(not)＋主语＋being done”]；_____疑问式[“特殊疑问词＋am/is/are＋(not)＋being done”]。 一般 特殊 既学既练 一、用所给词的适当形式填空. ① An interesting experiment _____ (carry) out now. ② We can hear that the papers _____ (print) quickly on the fast-moving printing machines. is being carried are being printed ③ What you _____ (tell) is true. ④ Some animals _____ (not protect) well enough. are being told are not being protected 二、同义句转换 ① They are studying the life of the panda at present. →The life of the panda _____ at present by them. ② The doctor is operating on the patient inside now. →The patient _____ by the doctors inside now. is being studied is being operated on ③ Are they building the bridge at present →Is the bridge _____ by them at present being built 三、单句语法填空/补全句子 ① A lot of wild animals _____ (kill) by hunters in Africa today. ② I have to go to work by taxi because my car _____ (正在修理) at the garage. are being killed is being repaired ③ How many bridges _____ (正在修建) in the village now ④ Look! The foreign guests _____ (正在被 ... ...
