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课件网) Unit 1 Science and Scientists Discover Useful Structures One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water. It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day. The truth was that the water from the Broad Street pump had been infected by waste. What do the sentences have in common in their structures One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food and water. ____ __ _____ 主语 系动词 表语从句 表语从句是指_____, 紧跟在_____之后，对主语进行解释、说明，使主语的内容具体化。 从句在句子中充当表语 系动词 变得：become、get、turn、grow； 保持：keep、stay; 仍然：remain 终止类: turn out(结果是)、prove（证明是） 常用系动词归纳 be动词 am、is、are 感官动词 look、sound、smell、taste、feel、seem、appear “变与不变”类的词 引导词 Conjunction words 引导词 用法 从属连词 that “无名无分” whether “有名无分”, 名为“是否” 连接代词 what, which, who, whom, +ever, whose 充当主语，宾语，表语，定语 连接副词 how, when, where, …+ ever, why 充当状语 其它连接词 because, as if/though 因为; 好像，似乎 (1)从属连词： that、whether (不能用if) 1. My belief is _____I will succeed by working hard. 2. The most pleasant thing of the rainy season is _____one can be entirely free from dust. 雨季最令人愉快的事情是完全没有灰尘。 3. The problem is _____we can find them there. whether that that that在从句中不做成分，也没有实际意义，但不可省略；whether也不能省略，意思为：是否。 (2) 连接代词引导的表语从句： 连接代词what, which, who, whom, wh-ever，whose等除了在句中起连接作用外，还在从句中充当主语、宾语、 表语、定语等，不能省略。 The question is which one we should buy. My concern is what he wants to get from us. His puzzle is whose money it belongs to. That’s what I should do. 1. You can be _____ you want to be. 2. The question is _____ caused the accident. 3. The most important thing is _____ responsibility it is. whoever whose what (3) 连接副词引导的表语从句： 连接副词when, where, how, why等除了在句中起连接作用外还在从句中充当时间、地点、方式、原因状语，不能省略。 The problem is how we can find him. That is where I first met her. That's why I object to the plan. That was when I was fifteen. 1. This is _____I don't agree with you. 这就是我不同意你的地方。 2. The question is _____we can get in touch with him. 问题是我们怎样才能和他联系上。 3. That is _____ I got wet through. 那就是为什么我被淋湿了。 where how why 1. 表语从句的【特殊句式】 The reason why.... is that.... “...的原因是...” The reason is that... “原因是...” The reason _____ I like English is _____ it brings me happiness. The reason is _____ English brings me joy. why that that 2. This /That/ It is because.... “这/那是因为...” This / That / It is why... “这/那就是...的原因。” because引导表语从句，从句表原因。 why引导表语从句，从句表结果。 I like En ... ...
