Unit 2 Bridging Cultures Discover Useful Structures 课件-2022-2023学年高中英语人教版（2019）选择性必修第二册

Unit2 Bridging cultures Grammar 1 What is Noun Clause? What is it’s function? Lead-in Learning aims: 1) To identify the usage of “Noun Clause” 2) To use them freely in the exercises. Study and independently(3') Look at the two sentences and summarize the definition of the Noun Clause. 名词性从句 名词性从句相当于名词词组，在复合句中可以做主句的主语、表语、宾语和同位语。因此，名词性从句分为主语从句、表语从句、宾语从句和同位从句。 。 (一)引导名词性从句的连接词 1、连接代词：who，whoever， whose， whom， what，whatever， which，whichever。有词义，在从句中担任成分，如主语、表语、宾语、或定语等。 2、连接副词：when，whenever， where，wherever， why， how。有词义，在从句中担任成分，作状语。 3、连接词：that， whether， if， as if。that 无词义，在从句中不担任成分，有时可省略；if (whether)， as if虽有词义，但在从句中不担任成分。 Self -learning guidance(8'): 1) Look at the following content in 基础盘点about on book P32. 2) To find out the functions and meanings 3) To find out the key and difficult points. 4) To find out the points you don’t understand. (二)主语从句 1、主语从句在复合句中充当主语的从句（可直接放句首）。 e.g. Who will go is not important. What he intended to show us was a small stamp. Whoever answers the question will be rewarded with a flower. 2、用it作形式主语，主语从句放在句末。 e.g. It is suggested that the meeting should be put off. 3、that引导主语从句时，不能省略。 e.g. That he suddenly fell ill last week made us surprised. (三)表语从句 1、表语从句在复合句中作表语，位于系动词之后。 e.g. The question was who could go there. The book is where you placed it. 2、引导表语从句的连接词that一般不可省去。 e.g. My idea is that we can get more comrades to help in the work. (四)宾语从句 1、宾语从句在复合句中作宾语,位于及物动词、介词、形容词之后。引导宾语从句的连词that一般可省略。 e.g. I hope (that) everything is all right. We will give you some advice on how you will pass the exam. We are certain that this is ture. 2、介词之后的宾语从句，不可用which或if连接，要分别用what或 whether。 e.g. I’m interested in whether you’ve finished the work. I’m interested in what you’ve said. 3、whether与if都可以引导宾语从句，常可互换。但下面情况不能互换。 ①宾语从句是否定句时，只用if，不用whether。 e.g. I wonder if it doesn’t rain. ②用if 会引起误解，就要用whether。 e.g. Please let me know whether you want to go. (此句如果把whether改成if，容易当成条件句理解)　 ③宾语从句中的whether 与or not直接连用，