新人教版选修八 Unit 1 A land of diversity-Grammar[课件]课件.pptVIP

Unit 1 A land of diversity Grammar— The Noun Clauses;名词性从句?;; Subject Clause (主语从句) Object Clause (宾语从句) Noun clause Predicative Clause (表语从句) ;?????????????????????????????主语从句 一个句子在复合句中充当主语叫主语从句。 e.g. That the earth is round is true . Whether she will come or not is still a question . What you are doing seems very difficult . When they will start has not been decided yet . ; 引导主语从句的连词是不能省略的。 That the earth is round is true That-从句作主语通常用it作先行词，而将that-从句置于句末，例如：It is true that the earth is round.Its a pity that you should have to leave.　你非走不可真是件憾事。;2.表示“是否”意义时，一般用whether 而不用 if引导主语从句， Whether she will come or not is still a question . 但如果有形式主语 it引导时，既可用 whether，也可用 if。 e.g. It is still a question if she will come or not . 3.有时可用形式主语it 代替主语从句： e.g. It is still a question whether she will come or not . It has not been decided yet when they will start . ;　用it作形式主语的that-从句有以下四种不同的搭配关系： It + be +形容词+ that-从句It is necessary that…　　　 有必要……It is important that…　　　 重要的是……It is obvious that…　　　　 很明显…… b. It + be + -ed 分词+ that-从句It is believed that…　　　　　人们相信……It is known to all that…　　　从所周知……It has been decided that…　　 已决定……　;c. It + be +名词+ that-从句It is common knowledge that ………是常识It is a surprise that…令人惊奇的是……It is a fact that…　　事实是…… d. It +不及物动词+ that-分句It appears that…　　　　似乎……It happens that…　　　　碰巧……It occurred to me that … 我突然想起…… ; ; what与that在引导名词性从句时的区别: what引导名词性从句时在从句中即起连接作用，又充当句子成分,如主语,宾语,表语,表示…的，.而that则不然,它在句子中只起连???作用,没有意义. (1) What you said yesterday is right. (2) That the earth goes around the sun is well-known to everybody. ;3. ____ leaves the room last ought to turn off the lights. A. Anyone? B. The person C. Whoever? D. Who 4. _____the sports meet will be held depends on the weather. A. Whenever B. If C. Whether D. That ;6. When and w