1、选修八 Unit2 CloningPeriod3 Grammar一、 教学目标1. 知识与技能A 复习同位语的构成；B 正确辨识并使用同位语从句的连接词；C 复习同位语从句和定语从句的区别。2. 过程与方法A 图解法B 列举法C 讲授法D 演示法3. 情感态度与价值观A 培养学生的规范语言表达；B 让学生体会语言的灵活多变。C 让学生体验学习的乐趣和成功的喜悦。二、 教学重、难点1. 同位语的作用；2. 正确判断并使用连接词；3. 同位语从句和定语从句的区别。四、 教学方法：1. 合作交流，小组讨论。2. 自主学习，独立思考。3. 探究学习。Step1：什么叫同位语同位语主要用作对名词（代词）
2、做进一步解释，它可以使单词、短语或从句。同位语从句是名词性从句的一种，置于某些名词之后，这类从句通常由that引导，有时也用what,why,whether,when等引导。1. The whole scientific world followed the progress of the first successful clone, Dolly the sheep.(名词作同位语)2. Altogether Dolly lived for six years, half the length of her original sheep.(短语作同位语)3. The fact that sh
3、e seemed to develop normally was very encouraging. （从句作同位语） 利用一个句子对主句的主语进行解释说明，就构成了一个同位语从句。Step2：同位语从句 The news is true. 主语 系 表The news that he has been elected monitor is true. 主语 同位语从句 系 表Step3: 同位语从句的引导词以从句的形式表示的同位语叫同位语从句。引导同位语从句的连接词通常有：1. 从属连词：that，whether（通常不用if）等，that不能省略；The truth is that he
4、has never been to the countryside.The question is whether we can finish the experiment by tomorrow afternoon.She looks as if she were very tired.2. 连接代词：what,who,whom,whose等； I have no idea what size shoes she wears.我不知道她穿几号的鞋。（what作定语）The question who will take his place is still not clear. （who作主语
5、）3. 连接副词：when, where, why, how等;We havent yet settled the question where we are going to spend our summer vacation.到哪儿去度暑假，这个问题我们还没有决定。The question whether we should take part in the parade was answered by the teacher.I have no idea how she did it.Step4: 同位语从句注意事项1. 同位语从句在复合句中作某些名词的同位语；常见的名词有：news,
6、fact, plan, suggestion, idea, order, question, truth, hope, thought, belief, doubt, fear等。2. 同位语从句之前的名词若为suggestion, requirement, advice等名词时，同位语从句的谓语动词须用虚拟语气。Step5: 同位语从句和定语从句区别3. 由that引导的同位语从句和定语从句之间的区别是，同位语从句是对前面的名词进行解释说明；而定语从句是对先行词进行修饰限定；同位语从句中的that不充当任何成分，定语从句中的that充当一定的成分。The news that he joine
7、d the army is inspiring.(同位语从句)The news that he told me is inspiring.(定语从句)Step6：practice 用正确的连接词填空。1）They expressed the hope they would come over to China soon.2) The fact he didnt see Tom this morning is true.3) Word has come some American guests will come to our college for a visit next week.4) He cant answer the question he got the money from his home yesterday.5) Do you have any idea is actually going on in the classroom?6) The problem we should have the meeting in the hall now must be decided at once.References：1.that 2.that 3.that 4.how 5.what 6.whether