英语24字整体教学
课堂探究
1．All efforts of cloning an animal will be in vain if there is not enough diversity in the group to overcome illnesses.
如果某个动物群体没有足够的多样性以战胜疾病，那么克隆这种动物的所有努力都将是无用的。
if引导条件状语从句
考点：vain adj.虚荣的；自负的；徒劳的 We tried in vain to make him change his mind. 我们试图使他改变主意，结果是白费心机。 阅读下列句子，归纳vain的用法
①She is one of those vain people who never take others' advice. 她属于那种自负得从不听别人劝告的人之一。 归纳：vain用作定语，修饰名词，意为自负的。 ②The police tried in vain to break up the protest crowds. 警察企图驱散抗议的人群，但没有成功
归纳：in vain 意为徒劳地，枉费力气，白费心机。 ③It is vain to persuade him to stop smoking. 说服他戒烟是没有用的。
归纳：it is vain to do sth意为做某事是没有用处的。 即学即用 完成句子
1）Smoking leaves Sam in poor health.His wife has tried ____________（徒劳地劝说）him
to quit smoking，though.
2）Heroes will not____________（白白死去）! 单句改错
3）It took him a great deal of courage to admit that all his efforts had been in return. ________________________________________________________________________ 答案：1）in vain to persuade 2）die in vain 3）return → vain
2．The advantage is that if there is a new illness some of these animals may die，but others will survive and pass on the ability to resist that disease to the next generation.
其优点是，如果发现了某种新的疾病，这类动物中的一些可能会死去，而另外一些却能存活下来，并且把这种抗疫力传给下一代。
1）that引导一个表语从句，而这个从句中又包含了if there is a new illness这个条
件状语从句。
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英语24字整体教学
2）动词不定式短语to resist that disease作定语修饰名词the ability。 考点：resist vt.抵抗；对抗 阅读下列句子，归纳resist的用法
①Lack of proper nutrition reduces their power to resist disease. 营养不良降低了他们对疾病的抵抗力。 归纳：resist sb/sth意为抵抗/抵制某人/某物。 ② When he got to the place，he couldn't resist going in. 他到达那里时，禁不住走进去了。
归纳：couldn't resist doing sth意为忍不住/禁不住干某事。 考点延伸 resist的派生词 ①resistant adj.抵抗的；有抵抗力的
This new type of infection is resistant to antibiotics. 这种新传染病对抗生素有抗药力。 ②resistance n．反对；抵抗；抗拒
There has been a lot of resistance to this new law.
反对这项新法律的人很多。 即学即用 语法填空
1）He made no ______（resist）against it. 完成句子
2）她真忍不住要笑。
She ______ hardly ______ ______. 3）我顶不住烤苹果的诱惑。 I ______ ______ baked apples.
答案：1）resistance 2）could；resist laughing 3）can't resist
3．The dodo became extinct fairly recently so its DNA is still in good condition. 渡渡鸟最近才刚灭绝，因此它的DNA仍旧完好。 考点：in good/poor condition 状况很好/坏；情况很好/坏 阅读下列句子，指出condition构成的短语及含义 ①I can't climb the mountain because I am out of condition. 我不能爬山，因为我身体不适。 短语：out_of_condition 含义：身体不适
②You can borrow the book on condition that you do not lend it to anyone else. 你可以借这本书，条件是不要把它借给别人。
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英语24字整体教学
短语：on_condition_that 含义：条件是，在……条件下 ③Don't worry about me.I'm in good condition. 不要担心我，我身体很好。
短语：in_good_condition 含义：身体很好 ④The car is badly damaged and in poor condition. 这辆汽车损坏严重，状况很坏。
短语：in_poor_condition 含义：状况很坏 ⑤You must on no condition tell him what happened. 你绝不要告诉他所发生的一切。
短语：on_no_condition 含义：在任何条件下都不，决不 即学即用 语法填空
1）I agree to his suggestion ______ condition that he drops all charges.
2）Though the old temple has a history of over 1000 years，it is still ______ good condition. 3）I had no exercise for ages；I'm really ______ of condition. 完成句子
4）The car is still ______ ______ ______. 这小汽车状况极佳。
5）Do more exercise or you will be ______ ______ ______. 多做锻炼否则你会身体不好的。
答案：1）on 2）in 3）out 4）in good condition 5）out of condition/in poor condition
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高二英语人教版选修8学案课堂探究Unit2Cloning—SectionWord版含解析 - 图文
