2019-2020学年英语高中人教版必修4学案：Unit2 Period 3知识讲练课

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1、Period 3 知识讲练课学习目标1.Grasp the usage of such important expressions as thanks to,rid of,lead to and focus on.2.Master the following sentence patterns:(1)In 1973,he became the first agricultural pioneer in the world to grow rice that has a high output.(2)Using his hybrid rice,farmers are producing harv

2、ests twice as large as before.(3)He would much rather keep time for his hobbies.学习过程Step 1 Words and expressions 1.Thanks to his research,the UN has more tools in the battle to rid the world of hunger.多亏了他的研究,联合国在消除世界饥饿的战斗中又多了些方法。【观察思考】(1)Thanks to your help,we were successful.由于你的帮助,我们成功了。(2)Thanks

3、 to you,I was saved from drowning.多亏你,我才没被淹死。(3)Thanks to the bad weather,the match had been cancelled.由于这倒霉的天气,比赛被取消了。thanks to 由于;多亏(有时用作反语);因为表示“因为,由于” 的短语还有:because of,owing to,on account of,due to,as a result of 等。以上这些都是介词短语,因此后面可以跟名词或动词-ing 形式而不可以跟从句。【尝试运用】单项填空(1)It was your timely help that w

4、e accomplished the task on time. A.because B.thank C.thanks to D.as (2) the new policy,we are now having a happy life. A.Thanks to B.Because C.For D.Thanks for【观察思考】(1)You should rid yourself of that bad habit.你应该改掉那个坏习惯。(2)It wont be long before we can get rid of the pest altogether.不用太久,我们就能把这种害虫消

5、除干净。rid sb/sth of sb/sth of 摆脱;除去be/get rid of 摆脱【尝试运用】同义句转换Could you rid yourself of the bad habit of smoking?Could you the bad habit of smoking? 2.Many of these chemicals can lead to cancer or other illnesses.很多化学成分能导致癌症或其他疾病。【观察思考】(1)The car accident led to his being killed.那次车祸导致他死亡。(2)All roads

6、 lead to Rome.条条大路通罗马。(3)Eating too much sugar can lead to health problems.吃太多糖会导致健康问题。(4)His carelessness led to his failure.他的粗心导致了他的失败。lead to 通向;导致 ;造成(后果)注意:lead to 中的 to 为介词,该短语后可跟名词或动词-ing 形式。result in 导致result from 由导致【尝试运用】单项填空The students in the university are all taking courses a degree.

7、A.sticking to B.leading to C.turning to D.referring to 3.They focus on keeping their soil rich and free of disease.他们主要是想保持土壤肥沃且免受病害。【观察思考】(1)He focused his mind on his lessons.他把心思集中在功课上。(2)Today were going to focus on the question of homeless people.今天,我们主要讨论无家可归者的问题。(3)A near-sighted person canno

8、t focus accurately on distant objects.近视的人看不清远处的物体。focus on 集中(注意力等 )于; 对(某事或做某事)予以注意;使聚焦于focus ones attention on sth= center/concentrate/fix ones attention on sth 集中注意力于【尝试运用】完成句子(1)在我看来,学校应该把精力集中在教学上。In my opinion,schools should . (2)他把相机对准了远处的高楼。He his camera the huge building in the distance. St

9、ep 3 Sentence structures we are going to learn1.In 1973,he became the first agricultural pioneer in the world to grow rice that has a high output.1973 年,他成为世界上第一位种植高产水稻的农业先锋。【观察思考】(1)He is the first to finish the homework.他第一个完成作业。(2)New Zealand is the first in modern times to allow women to vote.新西

10、兰成为现代史上第一个允许妇女有选举权的国家。不定式放在表示次序的词 the first,the last 以及 the best,the only,the very,the right等词后面,且这些词与动词不定式有逻辑上的主谓关系,结构为:the first/last/best/only/very/right.+n.+ to do sth 表示“第一个 /最后一个/最好的一个/唯一的/恰好的/合适的做某事的人/物。【尝试运用】单项填空He is the last person to Marys birthday party. A.to invite B.to be invited C.inv

11、ited D.being invited 2.He would much rather keep time for his hobbies.他宁愿把时间花在自己的爱好上。【观察思考】(1)Id rather you didnt.(常用来委婉拒绝别人 )我希望你不要。(2)He would rather stay at home watching TV.他宁愿待在家里看电视。(3)Id rather not go there.我宁愿不去那里。(4)Id rather you came tomorrow than today.我宁愿你明天来而不是今天来。(5)Id rather have made

12、 a telephone call to him yesterday.我昨天本想给他打个电话的。would rather 宁愿,宁可would rather.than.是常用句式 ,意为“ 宁可( 愿)(而)不要(愿)”would rather+从句时,从句要用虚拟语气,用动词的过去式表示。would rather have done 本想做(而实际上未做)【尝试运用】单项填空(1)Shall we go skating or stay at home?Which do yourself? A.do you rather B.would you rather C.will you rather

13、 D.should you rather (2)Id rather the basketball match last night.Otherwise,I would have finished my paperwork by now. A.not have watched B.not watch C.hadnt watch D.havent watch参考答案1.(1)C because 和 as 虽然也表示“因为,由于”,但后面需接句子,而句中是短语,故应用thanks to。句意:幸亏你及时帮忙,我们才按时完成了任务。(2)A 考查近义词辨析。 thanks to 意为“多亏了”;bec

14、ause 后应加句子;for 表示补充说明的原因。(3)be/get rid of 2.B 考查动词短语辨析。stick to “坚持”;lead to “导致,引起; 通往”;turn to “求助,转向,查阅”;refer to “指的是;谈论,查阅” 。由句意 “大学生都在学习课程,以取得学位”可知,答案为 B项。3.(1)focus attention on teaching (2)focused;on4.B 考查不定式作定语的用法。当名词前面有序数词或 last,next 等词修饰时,名词后面多用不定式作定语。5.(1)B 考查 would rather do sth 这一结构的用法。而 do,will 和 should 都不能与 rather 搭配。would rather (not) do sth 意为 “宁愿(不愿意) 做某事”。(2)A would rather not have done 意为“本不想做( 实际却做了 )”。后一句句意为:否则我现在已经完成了我的文件。所以前句表示“本不想看球赛却看了”,故选 A 项。