Unit1 Science and Scientists Discover useful structures 课件-2024-2025学年高中英语人教版（2019）选择性必修第二册

Unit 1 Science and Scientists Period 3 Discovering useful structures The Predicative Clauses contents The predicative clause Ⅰ Summary Ⅱ Homework III Lead-in IV 2 To learn the structure of predicative clause. To know how to judge the predicative clause. To master the conjunctions（连词） of predicative clause. Ⅰ Lead in 4 句子 类型 简单句 并列句 复合句 主句 形容词性从句 (定语从句) 名词性从句 副词性从句(状语从句) 主语从句 宾语从句 表语从句 同位语从句 从句 Definition and types: Ⅱ The predicative clause 6 The predicative clause The predicative clause 1 2 3 4 主语从句定义 主语从句连接词 主语从句注意事项 巩固练习 7 表语从句的定义 PART 01 ①His dream is to defeat Cholera. ②He finally became a successful scientist. ③The causes of the disease remain unknown to the public. ④The results of the experiment sound reasonable. Learn about something about John Snow and analyze what part does the underlined part serve as in each sentence. 表语 1.What’s the predicative? （什么是表语？） 9 表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、代词、数词、动词过去分词、动词的-ing形式、副词、介词短语、形容词、不定式和从句等来充当。 What is the predicative？ 10 ①What John Snow showed to the world was how cholera could be overcome. ②The exact places Snow marked on the map were where all those who died had lived. ③Snow’s finding was that the pump water carried cholera germs. 2.表语从句 系动词 表语从句 Observe the sentences and think about what is a predicative clause. 系动词 表语从句 表语从句 系动词 11 The question is who will do it. 定义：表语从句放在 之后，充当复合句中的 。 结构: It seems that it is going to rain. It looks as if he is unhappy today. 主语+系动词 + 连接词 + 简单句 系动词 表语 3.表语从句的定义 The definition of predicative clause The question is difficult. 在复合句中做表语的从句，叫做表语从句。它位于主句的系动词之后，对主语进行解释说明，使主语的内容具体化。 主语 + 系动词 + 引导词 + 简单句 This is why he did it. What I want to say is that I am tired. 表语从句 4.可以接表语从句的系动词 系动词的分类 1.感官类系动词 2.变化类系动(get, fall, grow, come, turn, go, become…) be动词 3.状态系动词 保持类系动词（keep, remain, stay） 似乎类系动词（ seem, appear ） 证明类系动词（prove, turn out) （sound, look, taste, smell, feel) （am, is, are, was, were) 意为“是” 表语从句的连接词 PART 02 One theory was ______ bad air caused the disease. Another was ______ cholera was caused by an infection from germs in food or water. (Para. 2) It seemed ______ the woman liked the water from the pump so much that she had it delivered to her house every day. (Para. 3) 一、that 引导的表语从句 that that that that ____ 意义，在表语从句中 ______ 成分,起______ 作用，________ 省略。 无 不充当 连接 不能 16 The question is _________ we can rely on him. He often tells lies. The question is _________ we can finish the task on time, for we have only three days left. 二、whether 引导的表语从句 whether whether 思考：可以用“if”来引导吗？ 连接词whether起 _____ 作用，意为“_________________”，在句中也不作任何成分（注意：if ______引导表语从句)。 连接 是否、究竟、到底 不能 17 三、what, which, who, whom, whose 等引导的表语从句 Tom is no longer _______ he used to be. The question is _______ of us should come first. (我们两个中的哪一个) The problem is ______ is really fit for the hard job. The important thing is _______name should be put on the top of the list. what which who whose 连接代词 what, which, who, whom, whose 除在句子中起 ______ 作用外，还可在从句中作 _____、_____ 或 ______，且各有词义。 连接 主语 表语 定语 18 四、where, when, why, how 引导的表语从句 That’s _______ I can’t agree with you. This is ______ Sara was late for the meeting. (She missed the early bus.) This is _____ they overcome the difficulties. My strongest memory is ______ I attended an American wedding as a child. where why how when 连接副词where, when, why, how除在句中起______ 作用外，在从句中还充当_______、______、______或______状语，本身具有词义。 连接 时间 地点 方式 原因 19 It seems __________________ he doesn’t know the answer. It looks __________________ it is going to rain. 五、as if / as though 引导的表语从句 as if / as though as if / as though as if / as though 引导的表语从句常置于_________ look, seem, sound,be,become 等_________。 系动词 后面 20 连接词 从属连词: that, whether, as if, as though, because … 连接副词: when, where, why, how 连接代词: what, who, whom, whose, which, …+ever （在从句中不作成分） （在从句中作主语、宾语、表语、定语） （在从句中作状语） Summary 1.引导词的用法 (that) that在表语从句中 ,又 且______ 省略。 1.The fact is that he hasn’t yet recovered from illness. 2.The reason why he has to go is that his mother is ill in bed. 既不充当成分 没有意义 不可 引导词的用法 The use of conjunction words whether在表语从句中表 , 但_______句子的成分。 1.What the doctor really doubts is whether my mother will recover from the serious disease soon. 2.The question is whether it is worth doing. “是否” 2.引导词的用法 (whether ) 不充当 引导词的用法 The use of conjunction words She asked me if /whether she could borrow these books . The question is if/whether we can rely on him. 在表语从句中, 表“是否” 时, 只能用“whether”不能用“if”。 I don’t know _______________ he wants to go alone. The problem was __________he could come on time. √ if or whether? if/ whether whether √ 引导词的用法 The use of conjunction words $$