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课件网) subject clauses 名词性从句 （主、宾、表、同） part1 简易定义：名词性从句是_____。 小句当名词用 主语是句子的主体，是执行动作的人/事/物或是句子所述说的主体，一般由名词、或具有名词性质的词、短语或句子构成，主语的位置通常位于句首。 I sat down. The house is very old. The tree was blown down in the storm. Underline the subjects of the following sentences. 1. David arrived last night. 2. Who is speaking, please 3. Two will be enough. 4. Looking up all the new words in the dictionary took him a lot of time. 5. To translate this ideal into reality needs hard work. 6. How to do well is an important question. 7. What has happened proves that our policy is right. subject clause 主语从句 Grammar 1. What seemed strange before now appears quite normal to Xie Lei. 2. What surprised Xie Lei was that she found herself speaking up in class after just a few weeks. 3. It is important that Xie Lei keeps a balance between her studies and her social life. 什么是 主语从句？ 主语从句，从句即是主语 关于各种从句，有一个浅显易懂的规律：它在句子里面是什么成分，就是什么从句。如： 1.定语从句：作定语（adj.）的从句； 2.宾语从句：作宾语的从句，放在动词或介词后面； 3.状语从句：作状语的从句，给主句增加信息量。 一、主语从句定义 什么是主语从句 在句子中担当主语的从句，我们将它称之为主语从句 1. I don’t know what I am doing. 2.Where we will go is important. 3.That he is a thief surprised me. 4.The news is that we will say good-bye to the Iron Man. 5. The message that they were divorced was spread. 6.What you said hurts me. 7.What doesn’t kill you makes you stronger. Rule 3 找出下列主语从句 √ √ √ √ × × × 主语从句应使用_____语序。 1. Where we will have a picnic should be discussed. Where will we have a picnic should be discussed. 2. How we go for a picnic should be discussed. How do we go for a picnic should be discussed. Rule 3 陈述句 √ √ × × 主语从句的语序 二、主语从句引导词 你知道主语从句的引导词有那些吗？ 从属连词 that,whether/if（是否）（if在主语从句中不能用于句首）. the boy didn’t know the answer made the teacher angry . make the teacher angry didn’t know the answer That 从属 连词 当主语从句本身不缺成分时，用that连接。只起连接作用，本身无实义，不充当任何成分，但不能省略 the boy can work out the problems depends on his ability. Whether 从属 连词 当主语从句本身含有“是否”的意思时，连接词必须用whether。不充当从句的任何成分。 whether与if引导主语从句： 主语从句位于主句谓语动词前，表示“是否”，只能用 whether引导；若用it作形式主语，则if与whether可互换。 例1：Whether it will do good to us remains to be seen. 改为： 例2：Whether the band would visit our city was still a mystery. 改为： It remains to be seen if/whether it will do good to us. It was still a mystery if/whether the band would visity our city. 不能换成if 可以与if 进行替换 if 不能置于句首 连接代词: who、whoever、whom、whose、what、whatever、which、whichever 在句中不仅起连接词的作用，并充当句中的主语、宾语、定语或表语。 what(……的内容), who(谁), whom( ... ...
