第八次课名词性从句.ppt

Noun Clause 主语从句（Noun Clauses as the Subject） Definition: 用作主语的从句叫主语从句，它是名词性从句之一。引导主语从句的连接词有：连词that, whether；连接代词who, what和which；连接副词when, where, how和why。 4 . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用\“should + 动词原形\”的形式, should有时可以省略。 It is strange that she should leave without telling us. 一、宾语从句的概念 宾语从句属于名词性从句，在句中作主句的宾语。 eg. We know Mr Green teaches English. She asked if these answers were right. 只能用whether不能用if的情况 1.在介词后面： I’m thinking of whether we should go fishing. We are worried about whether it will rain tomorrow. 2.在动词不定式前： They asked me whether to go skating. 3.当与or not连用，或提出两种选择时: I don’t know whether he’s free or not. Mary asked whether I was doing my homework or not. Tell me whether you’d like to go shopping or tidy the room. 4.宾语从句提前时： Whether this is true or not, I can’t say. （二）语序：陈述句语序 当从句的原句为以下句子以及what, who作主语时，语序不变： What’s wrong? What’s the matter? What’s happening? What happened? eg:I don’t know what’s the matter. Can you tell me who is over there? 主句用现在时或将来时，从句可用任何时态。主句用过去时，从句用与过去相关的时态。 1.从句说明的是一般真理、客观事实、自然现象、名言时，仍用现在时。 Dad told us that it is better to do than to say. He told the boy that three and three is six. He told me the earth moves around the sun. 2.从句中有具体时间状语，即使从句动作发生在主句动作前，仍用一般过去时。 The teacher told me she was born in 1960. 一、表语从句的定义： The question is who will do it. 三、引导表语从句的关联词的种类： 当时，我似乎怎么也想不出一个恰当的字眼来。 听起来好像有人在敲门。 5. 从属连词that that在表语从句中不充当任何句子成分，也没有任何意义。 The trouble is that I have lost his address. ?  麻烦是我把他的地址丢了。 表语从句的常用句型： 名词主语＋be＋that从句 The fact is that I was in the garden when the robbery happened. 作主语的名词通常有表示事实、真理的名词fact, truth 或表示看法观点的名词idea, opinion, belief, view, feeling, suggestion, plan等。 suggestion, proposal, advice, requirement 等词后的表语从句要用虚拟语气（should）do。 表语从句的常用句型： 名词主语＋be＋wh-疑问词引导的从句 The trouble is where we can get the things we need. wh- 引导的主语从句＋be＋that 从句 What surprise