Unit 1 Face values Period Ⅱ Using language—Grammar & Integrated skills课件(共77张PPT+ 学案）

英语　选择性必修 第三册 WY Period Ⅱ　Using language—Grammar & Integrated skills Grammar (主语从句) ①What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. ②The earth became so violent that it was not clear whether the shape would last or not. ③What is even more important is that as the earth cooled down, water began to appear on its surface. ④It was not immediately obvious that water was to be fundamental to the development of life. ⑤What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. ⑥So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. (1)以上例句中黑体部分在句中作_____。 (2)①句中的what在从句中作_____；③句中的what在从句中作_____；⑤句中的what在从句中作_____。 (3)②⑥句中的whether意为“_____”。 (4)④句中It是_____，真正的_____是后面that引导的从句。 答案：(1)主语　(2)表语　主语　宾语　(3)是否　(4)形式主语　主语 一、定义 在主从复合句中充当主语的从句即为主语从句。 What made people excited was that the solar ship had completed around－the－world trip. 让人们激动的是太阳船已完成了环游世界的旅行。 It worried the woman that her son was always playing computer games. 她的儿子一直在玩电脑游戏，让这位女士很担心。 二、连接词及其句法功能 1．从属连词：that, whether/if (1)that在从句中不充当任何句子成分，本身无任何意义，只起连接作用，但不可省略。 That she survived the accident is a miracle. 她在事故中幸免于难简直是奇迹。 (2)whether/if在从句中不充当任何句子成分，起连接作用，意为“是否”，不可省略。 Whether the plan will be carried out is still unknown. ＝It is still unknown if/whether the plan will be carried out. 这个计划是否会实施还不知道。 名师点津 whether引导的主语从句既可放在句首也可放在句尾，但if引导的主语从句只能放在句尾，前面需用it作形式主语。 单句表达 ①她能来帮助我们使我们很高兴。 _____ made us very happy. ②她来不来都无关紧要。 _____ doesn't matter too much. 答案：①That she could come to help us　 ②Whether she is coming or not 2．连接代词：who, whose, whom, what, which, whichever, whoever, whomever, whatever等 连接代词引导主语从句时，在从句中可以作主语、宾语、表语、定语。 Who will go to the concert is not known. 不知道谁会去听音乐会。 Whatever you do in your spare time should do no harm to others. 无论你在业余时间做什么都不应该伤害其他人。 Who he is is none of my business. 他是谁和我没关系。 Which side will win is not clear. 哪一方会赢还不清楚。 名师点津 who 引导的主语从句强调一件“事情”，而whoever引导的主语从句强调“人”。 3．连接副词：when, where, how, why等 连接副词引导主语从句并在从句中作状语。 When we will have a meeting is an important question. 我们何时举行会议是个重要的问题。 Where I spend my summer is no business of yours. 我在哪里过暑假不关你的事。 How this happened is not clear to anyone. 这件事怎样发生的，谁也不清楚。 名师点津 主语从句引导词的确定步骤 (1)分析句式结构，明确主语从句在句中的功能。 ... ...