英语从句整合.doc

（一）主语从句 主语从句 定义 　　在复合句中充当主语成分的句子叫做主语从句。 第一部分 　　常规主语从句，即句子在复合句中充当一个主语 　　主语从句的时态：不受主句的时态影响和限制。 　　（1）That he finished writing the composition in such a short time surprised us all. 　　（2）Whether we will go for an outing tomorrow remains unknown. 　　（3）Who will be our monitor hasnt been decided yet. 　　（4）Whom we must study for is a question of great importance. 　　（5）What caused the accident remains unknown. 　　（6）Whatever you did is right. 　　（7）Who the watch belongs to was lost is unknown. 　　（8）What we need is time. 　　（9）What we need are good doctors. 　　小结: 　　（1）引导主语从句连词有that,whether,who,what,whatever等 　　（2）连词位于句首不能省略 　　（3）主语从句大多数情况下视为第三人称单数，但也有例外，如例（9） 第二部分 　　为了防止句子头重脚轻，通常把形式主语it放在句首位置，真正主语搁置于句末 　　（1）It is certain that he will win the match. 　　（2）It is true that he has made a very important discovery in chemistry. 　　（3）It is very likely that they will hold a meeting. 　　（4）It is strange that he should do that. 　　（5）It is important that we all should attend the meeting. 　　（6）It is strange that the man should have stuck to his silly ideas. 　　（7）It is a pity that we wont be able to go to the south to spend our summer vacation. 　　（8）It is still a mystery what caused the accident. 　　（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai) 　　（10）It is known to all that the gun powder was first invented by the Chinese. 　　（11）It is suggested that the work should be done with great care. 　　（12）It happened that the two cheats were there. (=The two cheats happened to be there) 　　小结: 　　（1）为避免头重脚轻，常以形式主语it引导从句。 It+形式主语谓语+从句。 　　（2）由于主语从句一般被认为是单数形式，形式主语的谓语动词、be动词+表语 均为单数第三人称形式或过去式. 主语从句的用法 　　主语从句与宾语从句两者的用法和在句中的作用是不同的，下面从它们的各自用法来介绍。 　　一．主语从句 　　主语从句 定义：在句子中担当主语的是一个从句，这个从句就叫做主语从句。 　　主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。 　　1. It 作形式主语和it引导强调句的比较 　　①主语从句常用it作形式主语，一般常用句型为：It is+{名词/形容词/过去分词}+主语从句例如： 　　It is still a question whether she will come or not. 　　It is strange that you should like him. 　　It is still unknow