高二英语人教版选修8教案：Unit2CloningPeriod2 Word版含解析

Unit 2CloningPeriod 2Language Study整体设计教学内容分析The emphasis of this period will be placed on the important new words，phrases and sentence patterns in Warming Up，Pre-reading，Reading，Comprehending and Discovering useful words and expressions in Learning about Language.There are altogether 44 new words and phrases in these five parts.8 of them are marked with triangles，which shows that the students needn't learn them by heart.It is enough to recognize them when meeting them while reading the passage.The other 36 should all be remembered，among which the following words and expressions are even more important：straightforward，cast down，altogether，in favour of，compulsory，owe，retire，differ，undertake，pay off，object，objection，obtain，forbid.They are all very useful and important.We ought to pay more attention to them.三维目标设计Knowledge and skillsTo get the students to learn to use the following important new words and phrases freely：straightforward，cast down，altogether，in favour of，compulsory，owe，retire，differ，undertake，pay off，object，objection，obtain，forbid.Process and methods1．To help the students understand the meanings of the above useful new words and expressions in the context，and then give some explanations about them，and at last offer some exercises to make students master their usages.2．At the end of the class，make students do more exercises for consolidation.In doing so，they can learn，grasp and use these important language points well.Emotion，attitude and value1．To stimulate students' interest in learning English.2．To develop students' sense of cooperation and teamwork.教学重点、难点1．Important new words and expressions：differ，undertake，pay off，object，objection，obtain，forbid.2．Some difficult and long sentences in the text.教学过程Step 1Revision1．Check the homework exercises.2．Ask some students to talk about cloning.Step 2Reading and findingGet students to read through Warming Up，Pre-reading，Reading，Comprehending and Discovering useful words and expressions in Learning about Language to underline all the new words and useful expressions or collocations in these parts.Read them aloud and copy them down in the exercise book.Step 3Exercises for useful words and expressions1．Turn to Page 13.Go through the exercises in Discovering useful words and expressions with students and make sure they know what to do.2．Give them several minutes to finish the exercises.They first do them individually，and then discuss and check them with their partners.3．Check the answers with the whole class and explain the problems they meet wherenecessary.Step 4Vocabulary studyⅠ．简单知识扫描（A级）1．straightforward（P11）【原句再现】Cloning plants is straightforward while cloning animals is very complicated.克隆植物简单，而克隆动物很复杂。

【观察探究】（1）Installing the program is relatively straightforward.安装这个程序相对比较简单。

（2）The report was written in straightforward language.那个报告是用浅显的文字写成的。

（3）My father is straightforward in his dealings.我爸爸做买卖（待人）正直。

（4）Is this a straightforward route to the beach？这是到海滩去的直道吗？【归纳总结】straightforward adj.简单的，易懂的；坦诚的，坦率的；直的【知识链接】（1）straightforwardly adv.率直地，坦诚地（2）straightforwardness n.率直【即景活用】翻译下列句子（1）I'd like to listen to a straightforward explanation.________________________________________________________________________ （2）Jack is rough，but always straightforward.________________________________________________________________________ （3）She admired his straightforwardness.________________________________________________________________________ Suggested answers：（1）我愿意听率直的解释。

（2）杰克很粗野，但却总是很坦诚。

（3）她很欣赏他的率直。

2．cast down（P12）【原句再现】Cloning scientists were cast_down to find that Dolly's illnesses were more appropriate to a much older animal.研究克隆的科学家发现多莉得的病更容易发生在年老的羊身上，这让他们很沮丧。

【观察探究】（1）She was much cast down at the news that she failed in the exam.听到考试失利的消息她非常沮丧。

（2）He is not easily cast down.很少见他情绪低落。

（3）Don't let yourself be cast down by a small failure in the experiment；try again.别为了实验中的小小失败而垂头丧气，再试下去。

【归纳总结】cast down沮丧，不愉快（多用于被动语态）【知识链接】cast v．“扔；投；掷”。

如：He cast a stone into the river.他向河中投了一块石子。

【即景活用】翻译下列句子（1）不要这么沮丧，打起精神来！________________________________________________________________________ （2）听到这个消息他很沮丧。

________________________________________________________________________ Suggested answers：（1）Don't be so cast down.Just keep up your spirits.（2）He was cast down to hear the news.3．altogether（P12）【原句再现】Altogether Dolly lived six and a half years...多莉总共活了6年半……【观察探究】（1）You owe me $68 altogether.你总共欠我68美元。