名词性从句课件-1.ppt

主语从句 主语从句在复合句中做句子的主语。 连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。 在主语从句中作主语、宾语、表语、状语 这些连接词不能省略； What caused the accident is a complete mystery. (主) Whatever she said was right. (宾语) Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。 Whoever comes to the party will receive a present. （主语） When he’ll be back depends much on the weather. Where the English evening will be held has not yet been announced. (状语) 英语晚会将在哪里举行，还没有宣布。 Why he failed the exam wasn’t clear. (状语) How the book will sell depends on its author. (状语) （1） It + be + 形容词 + 主语从句 （2）It + be + 名词 + 主语从句 （3）It + 不及物动词 + 主语 从句 （4）It + 及物 动词的被动语态 +主语从句 It is a pity that we can’t go. It is certain that she will do well in her exam. It is said that Mr. Green has arrived in Beijing. It depends on the climate whether they are going shopping today. 2. 在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is suggested (requested, proposed, desired, etc.) that… 主语从句中的虚拟语气　 It is suggested, ordered, proposed, required, demanded, requested, insisted + that (should) do It is important, necessary, natural, desirable, strange, advisable, impossible+ that (should) do It is a pity, a shame, no wonder (难怪)+ that (should) do II. 表语从句 在句中作表语的从句叫表语从句。 2.1 引导表语从句的关联词 引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if引导。 其基本结构为：主语 + 系动词 + that从句， 引导表语从句的词有that，whether，who，what，which，whoever，whatever，whichever，when，where，why，how，because等。 (1) that, whether引导的表语从句 that在引导表语从句时无词义，不做成分， 而whether有词义，意为、“是否”,不做成分 。 这时主句的主语常常是些抽象名词,如 question, trouble, problem, result, chance, suggestion，idea，reason等。 eg: The reason is that you don’t trust her. The question is whether they will be able to help us. 问题是他们是否能帮我们。 (2) 连接代词引导的表语从句 连接代词what, who, whom, which, whose, whatever, whoever, whomever, whichever 在句中作主语/宾语，不能省略。 eg: The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。 Thats what he is