名词性从句是语法中的重要考点，也是不好把握的一个内容，教学中需要就基础知识和关系代词和关系副词的用法加以强调

Learn to use the noun clauses as the subject in real situations through self-study and practice.

　　Step 1. Lead-in

　　Ⅰ.主语从句在复合句中作句子的主语

　　What made her happy was that she won the game in such an important match.

　　令她高兴的是在这么重要的比赛中她获胜了。

　　stepⅡ.主语从句的引导词及在句中的功能

　　1.连词that,whether。

　　(1)that在从句中不作句子成分,只起引导词的作用,没有实际意义,不能省略。

　　That she could come to help us made us very happy.她能来帮助我们使我们很高兴。

　　That the big earthquake had killed many people frightened people all over the world.

　　大地震使很多人丧生令世界震惊。

　　(2)whether在从句中不充当任何成分,只起引导词的作用,但有"是否"之意,也不可以省略。

　　Whether we go by train or by boat makes no difference.我们乘火车还是乘船去没有差别。

　　It is still unknown whether the plan will be carried out.这个计划是否会实施还不知道。

　　2.连接代词who, whose, whom, what, which, whichever, whoever, whomever, whatever等在从句中作主语、宾语、表语或定语,每个词都有自己的具体的含义。

　　What is needed for the space trip is careful preparation.太空之旅所需要的就是认真准备。

　　Who will go makes no difference.谁去没有区别。

　　Whatever you do in your spare time should do no harm to others.

　　无论你在业余时间干什么都不应该伤害他人。

3.连接副词when, where, how, why在从句中分别作时间、地点、方式、原因状语。