高中英语选修八Unit 02 B.ppt

Discovering useful words and expressions.;Discovering useful structures.;1977年多莉羊诞生的消息宣布后便成为一项科学突破。但是，后来多莉羊染上严重肺病的问题又让科学家们忧虑。2003年2月14日科学家们作出让多莉羊长眠的决定。多莉之死正如它的出世一样，肯定会带来焦虑。多莉早亡的事实令世人失望。科学家们认为克隆可能会带来很多重大的科学突破和医学疗法，但他们现在不得不思考这样一个问题：“多莉早死是因为它是一只克隆羊吗？”除此而外，关于是否应该允许进行人类克隆实验的问题也引起了激烈的争论。科学家们相信人类克隆只不过是时间问题，但是克隆人已经问世的说法还没有被证实。;Unit 2 Grammar;1. Tom, our monitor, is a handsome boy. 2. I myself will do the experiment. 3. She is the oldest among them six. 4. He told me the news that the plane had exploded. ; 同位语是句子成分的一种, 它位于名词、代词后面, 说明它们的性质和情况, 它可以由名词、代词、名词性短语或从句充当。;同位语的表现形式有以下几种： (1) 名词 (2) 代词 (3) 数词 (4) 从句 (5) 由such as, that is引导 Some subjects, such as maths and physics, are very difficult to learn. 某些学科, 例如数学和物理, 是很难学的。 (6) 由 of 引导 The city of Beijing has been greatly changed since 2000. 自从2000年以来, 北京市发生了很大的变化。;(7) 由 or 引导 The freezing temperature, or freezing point, is the temperature at which water freezes under ordinary pressure. 结冰温度即冰点, 是水在常压下结冰时的温度。;The hope that he may recover is not gone yet. The problem whether we should continue to do the experiment has been solved. I have no idea when he will come back. ;(1) 同位语从句的定义 在复合句中用作同位语的从句称为同位语从句。同位语从句是名词性从句的一种。它在句中起同位语的作用。　;它一般放在fact, news, idea, truth, hope , problem, information, belief, thought, doubt, promise, question等名词的后面,对前面的名词作进一步的解释, 说明前面名词的具体含义。引导同位语从句的词有连词that, 连接副词how, when, where, whether 等。;The story goes that William Tell killed the king with an arrow. Word came that their team had won.;(2) 同位语从句的表现形式: ① 由that引导 The fact that you haven’t enough time to do the work is simply unbelievable. The hope that he may come here is not gone yet.;The news that he has been elected president of the United States is true. The truth that heavy objects and light objects fall at the same speed is known to all. T