名词性从句讲义..doc

名词性从句讲解 1基础知识 由一个主句和一个或一个以上的从句构成的句子叫复合句。名词性从句相当于名词，可以作主语，宾语，表语和同位语。因此，名词性从句可分为主语从句，宾语从句，表语从句和同位语从句。如： I believe what he said. It remains to be seen whether this plan is practical enough to keep the project going. 名词性从句的种类 种类 作用 例句 主语从句 在复合句中作主语，相当于名词，置谓语之前，也可用it作形式主语，主语从句放后 Whether he will come or not doesn’t matter. It doesn’t matter whether he will com or not. 宾语从句 在复合句中作及物动词或介词宾语，相当于名词。 He asked me which team could win the game. The teacher is satisfied with what you have done. 表语从句 在复合句中作表语，位于系动词后。 It looks as if it is going to rain. 同位语从句 放在抽象名词（news, idea, fact, advice, hope等）之后表明其具体内容。 My father gave me a promise that he would buy me a bike. The fact that he lied again greatly surprised. ①陈述句作成分时，需要在句首加that; ②一般疑问句作成分时，需要将疑问句变成陈述语序，然后在句首加上whether或if，以保留原句的意义（if只用在宾语从句中）；③ 用特殊疑问句作成分时，只需将疑问句转换成陈述语序。要学会分析疑问词的成分。如： I have no idea when they will visit our school; we have got everything ready. What matters most in learning English is enough practice. Elephants have their own way to tell the shape of an object and whether it is rough or smooth. 一、名词性从句的连词用法 名词性从句的连接词有从属连接词、连接代词和连接副词。 考点一 从属连接词 1. that无词义，不做成分；that引导宾语从句时可省略，但引导的并列的宾语从句时，后一个that不可以省略。 That an earthquake happened in Sichuan shocked all the Chinese people. He said (that) he had been working here for ten years and that he wanted to go home. 2. whether/ if “是否”，不作成分，不省略。 The havent known if/ whether they hand in their homework. 注意：以下情况中用whether不用if ⑴. 主语从句、表语从句、同位语从句、介词后的宾语从句中。 ⑵. 与or not直接连用时。 ⑶. 与不定式连用时。 He was worried about whether he passed the English exam. I dont know whether to go or not. Whether it will rain tomorrow is unknown. 3. because“因为”，as if/ though“好像”，可引导表语从句，不作成分。 His success is because he works hard. 【反馈练习】用正确的词填空 1. It’s no surprise __________ our team has won the game. 2. I don’t care __________ or not she comes. 3. It looks __________ it is going to rain. 4. I consider it necessary __________ he should improve his pronunciation. 5. That’s __________