Unit2 Witnessing time 名词性从句名词性从句: 即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。 一、引导名词性从句的连接词 连接代词：who, whom, whose, what, which, whoever, whatever, whichever 连接副词：when, where, how, why, whenever, wherever, however连接词：whether, if “是否”不充当句子的任何成分。 that 只能起连接主句和从句的作用，不充当从句的任何成分，无词义。二、名词性从句的分类1. 主语从句：用作主语的从句叫主语从句。That she likes such kind of films is very interesting. Whether he will come remains a question. What she is doing is none of your business.Whoever comes will be welcome.Where he has been is still a puzzle.However you do it is all right with me.2. 表语从句：表语从句在句中作表语，它位于主句的系动词之后。The problem is that smokers cannot go without smoking . 问题是抽烟的人不抽烟就会感到难受。 The question is whether it is worth doing . 问题是这是否值得做。China is no longer what it used to be . 中国已不是从前那个样子了。This is where he has worked for years . 这就是他多年工作的地方。3. 宾语从句：在句中可以作谓语动词或介词或某些形容词的宾语。They know that the habit may kill them . They doubt whether or not Jack is a good student . The teacher is satisfied with what she has said . I’m glad that I can go with you .4. 同位语从句: 同位语从句说明其前面的名词的具体内容。可用于同位语从句的名词有 advice, fact, demand, doubt, hope, idea, information, message, news, order, problem, promise, question, request, suggestion, truth, wish, word 等。The news that we won the game is exciting. I have no idea when he will come back home . Word came that our football team had won the match . 三、名词性从句中的注意点主语从句：1. 有时用形式主语 it 代替主语从句作形式主语放于句首，而把主语从句置于句末。常用句型如下。1) It is +名词+ that … (名...
