必修三--unit4-主语从句.ppt

一、主语从句的定义 二、主语从句的构成 三、主语从句的引导词 四、 it 可作形式主语 五、主语从句需注意的问题 三、主语从句的引导词： 从属连词: that, whether； 连接代词: who , whom, whose, which, what ； whatever，whoever，whichever 连接副词: when, where, how, why。 When he will be back depends on the weather. Where the test will be given is not yet decided. Where and when he was born is a secret. Why he came here is not known. How we can protect the endangered animals needs to be discussed. How many people died in the earthquake was unknown. 注意：whatever，whoever，whichever在主语从句中不含疑问意义。它引导主语从句，并在从句中作主语、宾语或表语等。 He is said to go abroad soon.据说他不久要出国。 表示不定式所表示的动作尚未发生或将要发生 The tigers are said to be endangered.据说这些虎处于濒危状态 表示一般情况(尤其是当不定式表示状态而非动作时)。 They are said to be researching into the question.所说他们正在研究这个问题。 The film is said to have been going on for two months.据说这部电影已经 上演两个月了。 This book is said to have been translated into several foreign languages.据说这本书已经 被译成好几种外语。 4.????? It + 不及物动词或短语 + that 从句 ( seem, happen, doesn’t?matter ,…） 如： It?happened?that?I?was?out?that?day. ?(碰巧…) It seems that he has known it.(好像...) It?doesn’t?matter?whether?she?will?come?or?not.? 注意:that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去。 It is suggested ( ordered, required ... ) that ... +(should) do“ 据建议；有命令,有人要求…” 该句型中的过去分词是表示请求，建议，命令等词时 e.g. It is suggested that we （should） go at once. It is required that everyone here should be able to use computer. 2.It is important /necessary/strange... that ...+(should) do e.g.It is important that the students learn English well. It is strange that you should like him. It is necessary that you should master the computer. 4. 主语从句后面的谓语动词用第三人称单数； Whether?he’ll?come?here?____ (be) not?clear.? 5. what引导主语从句时，谓语动词： 1）常与其后的名词表语一致 2）根据句子的语境而定。 What you left _____ (be) only several old books. What you said ____ (be)of great importance. * The Subject Clause主语从句 名词性从句（三） 找出下列句子中的主语： 1) You are a student. 2) His job is important. 3) To find your way can be a