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高二英语选修8unit 2CIoning导学案Period 3 Language points一. 学习目标：l. To get the Ss to learn to use the important new words and phrases freely.2. To get the Ss to experience the procedure of the debate contest.二. .教学重点To use some useful words and expressions.三 Teaching difHcult point:1. The understanding and analyze of some difficult and long sentences in the text.2. Ask the Ss to talk about cloning.三预习自测Discuss the advantages and disadvantages of cloning.Problems or dangers of cloningAdvantages of cloning四.作探究：Language points:1. This happens in plants when gardeners take . when twins identical in sex and .1) when gardeners take cuttings from growing plants to make new ones, .whentwins identical in是两个时间状语从句。when引导的时间状语从句中从句的动作可以与主句的动作同时发生，也可以先于主句的动作。Dont be afraid of asking for helpit is needed.A. unlessB. sinceC. althoughD. when2) happen vi. occur by chance; take place (偶然地)发生；出现happen to do . happen to sb.It happened that.happening n.事件；偶然发生的事(常用复数)辨析：happen, occur, take place与come about四词都有“发生之意，但有区别。happen是一般用语，词义较广，强调事情发生的偶然性；occur用法较正式，既可以指自然发生，也可以指有意安排。take place 一般指有计划，按事先安排的进行的含义。come about往往注重事情发生的原因，常与how连用。以上四组词均为不及物动词，无被动语态。Use the above words to fill in the blanks1) When did the explosion?2) Important electionsthis fall.3) The concert willnext Sunday.4) How did the quarrel?2. undertake vt. (undertook; undertaken)着手做，从事，进行；担任，承担，答应,The procedure is difficult to undertake, of course.当然，这个过程很难实施。The scientist undertakes the experiment.科学家从事这项实验。I can undertake the responsibility for the changes 我愿意承担这些变革的责任。完成下列句子。1）The lawyera new case.那个律师接了一个新的案子。2）He willnext month （去旅行）.3）He.（承担一项新任务）3. pay off （事业、计划等）成功；付清薪水并解雇；偿还（债务等）。At last the determination and patience of scientists paid off.最终科学家们的决心和耐心得到了回报.He paid off the crew of the ship.他付清全体船员的工资并将他们解雇。In the end he paid off all his debts.最终他还清了 所有的债务。pay back报答；报复用介词back, off, to,填空：1）Your effort is sure to pay.Thank you for your encouragement.2）The supermarketwhich he had ever paid a visit, was burnt to the ground.3）How can I pay youfor all your kindness?4）Well, after these years, weve at last paidall our debts.4. The fact that she seemed to develop normally was very encouraging.多莉看来是在正常地成长着，这很令人鼓舞。“that she seemed to develop normally是同位语从句。同位语从句可由 when/ where/how/ why/that/ whether 等词引导。先行词多半是 idea/ fact/ news/hope/ belief/thought/ doubt/question等。同位语从句一般放在抽象名词之后，用以说明抽象名词的具体内容，有时为了保持句子的平衡，同位语从句还可以放在动词的后面。如：Soon word came that we won.5. Then came the disturbing news that Dolly had become seriously ill.然后传来了多莉病重的坏消息。本句中，副词then放于句首，主语是名词news, “that Dolly had become seriouslyill”是同位语从句，句子用了倒装语序。In the dark forests, some large enough to hold several English towns.A. stand many lakes B. lie many lakes C. many lakes lie D. many lakes stand6. cast down使沮丧；毁掉（常用于被动语态或j乍表语）Cloning Scientists were cast down to find that Dollys illness were more appropriateto a much older animal.克隆科学家沮丧地发现多莉的病更容易在年老的羊身上。不要这么沮丧，打起精神来！Dont be so cast down. Just keep up your spirits.cast away丢弃 castoff 放弃；丢弃 cast out 赶走将下列句子译成英语。1）听到这个消息他很沮丧。2）发现事情的真相使他很沮丧。7.object vi.We object to being treated like this.我们抗议这种待遇。I object to the plan.我反对这项计划。object vt. I object that he is too young to take that position.我提出反对意见：他太年轻不适合那个职位。object to (doing ) sth. object + that 从句objection 是名词,常与 have, take, feel 等连用 have / take / feel objection to(doing )sth.即时练习：句型转换(1) Have you any objection to my opening the window?=Would youmy opening the window?(2) take objection to smoking.= Ismoking.(3) “But he is too young,” she argued = Shethat he was too young.13. attain vt.获得(尤其指经过努力)达到(年龄，水平,状况等)He attianed success through hard work.He attained the age of 25 before marriaging.比较：obtain vt.(经买，借，拿等)获得，得到某物He always manages to obtain what he wants.Where can I obtain a copy of her latest books?8. forbid vt. (forbade; forbidden)禁止，不许，妨碍,阻止Governments became nervous and many forbade research into human clothing.政府开始感到不安，有许多政府禁止对克隆的研究。Smoking should be forbidden in public places.公共场所应禁止吸烟。Her father forbid her to go out alone.她父亲不许她单独外出。I forbid you entering my study.我不许你进入我的书房。forbid sb. to do / forbid sb. from doing sth.禁止某人做某事forbid sth.禁止某事与forbid结构相同的词有：permit sb to do / permit doing sth 允许某人做某事/允许做某事；allow sb. to do /allow doing sth 允许某人做某事/允许做某事；advise sb. to do / advise doing sth.建议某人做某事/建议做某事1) The school(禁止学生吸烟).2) He is forbidden to(进入这个房间).3) There are laws in some countries which forbid advertisements at inappropriatetimes and places.A. being shown B. shown C. show D. to have shown4) At the conference he was forbiddenthe subject again.A. mentioning B. to mention C. mention D. mentioned9.1s it in favour of cloning or against it?in favour of是固定短语，意思为：赞同，支持；等同于approve ofo如：As to education, most specialists are in favour of further reform. 关于教育问题，多数专家支持做进一步改革。do a favour for sb. / do sb. a favour 帮某人一个忙与in favour of结构相同的短语有：in praise of 表扬 in honor of /in memory of 纪念 in case of 如果，假使 incharge of 掌管 in possession of 拥有in consequence of 由于，作为的结果用上述短语填空。1) All his family are his decision to work in western area aftergraduation.2) While reading,coming across new words, youd better guess theirmeanings rather than refer to the dictionary.3) Mary told me that she wassome lovely jewels.4) They had to move to another citythe typhoon.五.当堂检测及总结提升：1. In many aspects natural clones, such as identical twins, do not dgreatly fromman-made ones.2. He was cdown when the procedure he had used to produce a mammal cloneended in failure.3. Dust will ain a deserted house.4. Her memory is so excellent that she could remember the enames5. She was not apleased at the corrections he made to her work.6. Grey decided to move to the countryside and his wife made no oto it.7. According to the constitution, it is compulsory for a citizen to umilitaryservice.8. The media has a mresponsibility to report news truthfully.Homework:1.Complete the Exxl,2,3 on page 13 in the SB.2 .阅读同位语从句的定义及用法并做同位语从句的预习自测。
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