Unit 2 Heroes Lesson 2 Lesson 3课件（北师大版必修1）.ppt

牛刀小试 We went through a period ________ communications were very difficult in the rural areas. A．which B．whose C．in which D．with which 解析：选C。句意：我们经历了一个乡村地区通讯十分困难的时期。句中a period为先行词，代入从句为communications were very difficult in the rural areas in the period，由此可见先行词在定语从句作介词in的宾语，故用in which，此处的in which 相当于when。 8 Brandi，the sisters’ mother，taught her daughters at home so that they completed their high school while developing their tennis careers. 妈妈布兰蒂则在家中教两姐妹文化知识。这样，才使她们既没有间断网球生涯，又能顺利地完成高中学业。 (1)此句中the sisters’ mother用作同位语，对其前的主语Brandi进行补充说明。 品味经典 ①Steven Hawing，a well-known scientist，is famous for his optimism and self-confidence. 斯蒂芬·霍金，一个闻名于世的科学家，以其乐观和自信而著名。 (2)此句中while引导的时间状语从句中省略了主语和助动词they were。 品味经典 ②Once taught what to do，computers show extraordinary power in carrying it out. 一旦人们教会电脑做什么，它们便在执行方面表现出了超凡的能力。 自我探究 在时间、条件、让步、方式等状语从句中，当从句主语与主句主语一致时，从句的主语和其谓语的一部分可以省略，从而“构成连词＋分词”的情况。一般来说，主句主语与分词之间是逻辑上的主动关系，则选用现在分词；如是被动关系则用过去分词。 (3)so that。so that既可以引导结果状语从句，也可以引导目的状语从句，在引导目的状语从句时，从句中常用情态动词can，could，might等。 品味经典 ③I opened the window so that the fresh air came in. 我打开窗户，这样，新鲜的空气就进来了。 ④He spoke slowly so that I could hear him clearly. 他讲得很慢，目的是让我能听清他。 自我探究 ⑤He is so young that he can’t go to school. 他是那么小以至于他不能上学。 ⑥There is so little rain in the southwest that water is in great need. 西南地区雨水太少以至于水极度缺乏。 牛刀小试 (1)When ________ different cultures，we often pay attention only to the differences without noticing the many similarities. A．compared B．being compared C．comparing D．having compared 解析：选C。句意：在比较不同的文化时，我们通常只注意其不同点，而忽视它们的许多相似之处。主句主语与分词之间是逻辑上的主动关系，排除A、B项；而compare与pay之间又没有先后关系，故排除D项。 (2)He never speaks unless ________. A．spoken B．speaking to C．spoken to D．speaking 解析：选C。句意：他从不主动说话除非别人和他说话。speak 的逻辑主语为主句主语he，根据句意可知两者之间为被动关系；又因动词“和某人说话”为动词搭配speak to sb.，故选择C项。 (3)Considering its diverse cultures，Spain is an attractive country，________ well worth a visit. A．it B．one C．this D．that 解析：选B。此句中的one用作country的同位语，对其补充说明。 (4)(2011年浙江嘉兴一中高一检测)Your article must be se