名词性从句教学演示课件.pptVIP

Grammar The Noun Clauses 名词性从句? 　　在句子中起名词作用的句子叫名词从句 (Noun Clauses）。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句(Subject Clause)、宾语从句(Object Clause)、表语从句(Predicative Clause) 和同位语从句(Appositive Clause Who will win the match is still unknown. I want to know what he has told you. The fact is that we have lost the game. The news that we won the game is exciting. Subject Clause (主语从句) Object Clause (宾语从句) Noun clause Predicative Clause (表语从句) ????????????????????????????? _____ the earth is round is true. _______ she will come or not is still a question. _____ you are doing seems very difficult. ______ 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 . 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 . It has not been decided yet when they will start . 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,它在句子中只起连接作用,没有意义. (1) What you said yesterday is right. (2) That the earth goes around the sun is well-known to everybody. ???????????????????????????????????????????? ? 一个句子在复合句中充当宾语就叫宾语从句。 Do you know ______ he is ? I’m glad ______ you have passed the exam . I don’t know whether (if) you are willing to help me . 特别提示 1.由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。 2.下列宾语从句 必须用whether 引导， 不可用if: a.??从句后有or?not?时，不可用if : I don’t kno