(课件网) Period ４ UNIT 2 WILDLIFF PROTECTION 主题语境 人与自然 ——— 人与动植物 课时学案 单元语法讲练(Discovering Useful Structures) 1．reduce vt．减少 (1)reduce...by... 把……减少了…… reduce...to... 把……减少到…… be reduced to 陷入某种境地；使沦为(to为介词) (2)reduction n． 减少 [即学即练] 单句语法填空/完成句子 ①The cultural relic _____ (reduce) to ruins，which made us depressed． ②As is known to all，using clean energy plays an important role in pollution _____ (reduce)． ③由于大雾，司机不得不把速度减到每小时40千米。 It was foggy so the driver had to _____ forty kilometres an hour． was reduced reduction reduce speed to 2．due adj．由于；因为；到期的；预期的；适当的；应得的 due to 由于；因为 be due to do sth． 预定/计划做某事 be due to sb． 应支付/给予/归于某人 [名师点津] 表示“由于/因为”的词或短语还有：for，because，because of，owing to，thanks to等。 [即学即练] 单句语法填空/完成句子 ①The express train is due _____ (arrive) at 10：00 p．m．，so remember to meet me on time． ②I have missed plenty of beautiful sunsets/sunrises due __ being on the spot only five minutes before the best moment． ③由于我的英语老师的帮助，我的英语成绩总是不错。 _____，my English scores are always not bad． to arrive to Due to my English teacher's help 一、含义 现在进行时的被动语态表示现在或现阶段正在进行或发生的被动动作，强调主语是动作的承受者。 二、结构 1．肯定式：主语＋am/is/are＋being done... Some trees are being cut down in the park． 公园里的一些树木正在被砍伐。 现在进行时的被动语态 2．否定式：主语＋am/is/are＋not being done... 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。 3．一般疑问式：Am/Is/Are(not)＋主语＋being done... Are the babies being taken care of by this nurse？这些婴儿正由这个护士照看吗？ 4．特殊疑问式：疑问词＋am/is/are(not)＋主语＋being done... When is the sports meeting being held in our school 我校将在什么时候举行运动会？ [即时训练1] 句型转换 They are building a modern school in his hometown． ①_____. (改为被动语态) ②_____.(把①句改为否定句) A modern school is being built in his hometown A modern school isn't being built in his hometown ③_____(把①句改为一般疑问句) ④_____(对①句就in his hometown进行提问) Is a modern school being built in his hometown Where is a modern school being built 三、用法 1．表示说话时正在进行的被动动作。句中常用now，at the moment等时间状语。 My younger sister is now being interviewed． 我妹妹现在正在接受采访。 He is now being treated in China． 现在，他正在中国接受治疗。 2．表示现阶段正在进行的被动动作(说话时不一定在进行)。 These animals are being hunted at such a speed that they will disappear soon． 以这样的速度捕杀这些动物，它们很快就会消失。 3．表示一种习惯的被动行为，常与always，constantly，often等词连用，表示赞赏、羡慕、讨厌等感彩。 I feel very surprised that the window of our classroom is often being broken． 我感到非常吃惊的是我们教室的那扇窗户经常被打破 ... ...
