Unit 1 Science and Scientists Learning About Language第2课时课件 2023-2024学年高中英语人教版（2019）选择性必修第二册

Unit 1 Science and Scientists Learning About Language Period 2 Understanding science and pushing the boundaries of science is what makes me immensely satisfied. —Bill Gates The doctor has been taught to be interested not in health but in disease. What the public is taught is that health is the cure for disease. —Ashley Montagu Warming-up Read the following sentences and find out the clauses and the linking words. Linking verb Linking verb 2 Some key points 定义：在主从复合句中充当表语的句子。 作用：说明主语是什么。可以由名词、形容词或相当于名词或形容词的词或短语充当表语的成分。然而要注意，表语从句属于名词性从句，只是表语的其中一种情况——由名词充当表语。 判断：表语在系动词之后出现。 常见系动词： 状态类：be动词, seem, appear, keep, remain, stay … 感官类：look, smell, taste, sound, feel … 变化类：become, get, turn, grow, fall, come, go … Grammar focus 3 表语从句的引导词： 连词：在从句中不作成分。 that, whether, as if, as though … 连接代词：在从句中作主语、宾语、表语、定语 what/whatever, which/whichever, who/whoever, whom, whose … 连接副词：在从句中作状语 when, where, why, how, because … Grammar focus 4 选择表语从句的引导词，主要从表语从句的句子结构和所要表达的句意两个角度来判断。 引导词在表语从句中充当的成分 引导词 备注 主语 who, what, which, whatever, whichever 根据句意选择 宾语、表语 whom, who, what, which, whoever, whatever, whichever 定语 whose, what, which 状语 when, where, why, how 不充当成分 that, whether, as if, as though, because Grammar focus 5 表语从句一定是陈述语序。 例：问题是他什么时候能到。 The question is when will he come. The question is when he will come. if可以引导宾语从句，但是不能引导表语从句，引导表语从句表达“是否”只能用 whether。 例：问题是他是否通过了测试。 The question is if he has passed the test. The question is whether he has passed the test. Some use