人教版英语选择性必修第一册 Unit 5 Working the land Period 3 Learning about language Discover useful structures: Subject clauses 在复合句中充当主语成分的从句叫做主语从句。 Discover useful structures: Subject clauses What Yuan Longping really cared about was not money or celebrity. That Yuan Longping had realised his dream of seawater rice surprised the whole world It's surprised the whole world that Yuan Longping had realised his dream of developing seawarer rice. Discover useful structures: Subject clauses 主语从句，即在复合句中充当主语成分的句子. That he finished writing the composition in such a short time surprised us all. 他在很短的时间内写完作文让我们都很惊讶 此复合句主要描述的是某事让我们惊讶，某事就是该复合句的主语，因此“That he finished writing the composition in such a short time”便是该复合句的主语从句。 引导主语从句的连词主要有： 从属连词：that whether 连接代词：who whoever whom whose what whatever which whichever 连接副词：when where how why whenever wherever however 引导词+主语+动词=主语从句 试翻译:我们明天是否会去郊游仍旧未知。 tomorrow remains unknown. Whether we will go for an outing Discover useful structures: Subject clauses 主语从句的时态不受主句时态的影响和限制,主语从句常作单数。 （1）Who will be our monitor hasn't been decided yet. 谁当我们的班长尚未决定。 （2）Whom we must study for is a question of great importance. “我们为谁而学习”是个很重要的问题。 （3）What caused the accident remains unknown. 事故的起因是未知的。 （4）Whatever you did is right. 你做的任何事都是正确的。 （5）Whom the watch belongs to is unknown. 手表的归属是未知的。 （6）What we need is time. 我们需要的是时间。 （7）What we need are good doctors. 我们需要的是好的医生。 Discover useful structures: Subject clauses 归纳总结： ★主语从句必须有引导词；主语从句用陈述句语气。 ★连词位于句首不能省略 ★主语从句大多数情况下视为第三人称单数，但也有例外. ★主语从句引导词的选择主要是根据从句的结构和意义来选择。 如果从句的意义和结构完整，则用that。 如果从句的意义和结构不完整，则根据从句的意义和结构选择相应的引导词。 练一练：用适当的连词填空 _____ bag it is cannot be told. _____ India needs is a law to make land ownership fairer. It is not yet decided _____ cash crop will be produced next year. _____ he said was right. Whose What What/Whatever which/what Discover useful structures: Subject clauses 比较that / what 1. _____ he wants is a book. 主语从句 2. _____ he wants to go there is obvious. 主语从句 3. _____ happened is not clear. 主语从句 4. This is the best TV_____ is made in China. 定语从句 5. The first museum _____ he visited in China was the History Museum. 定语从句 that 和what 的选用：that 和 what 都可引导主语从句。但是，what除起连接作用外，还在主语从句中充当成分，可做从句的主语、宾语、或表语，相当于the thing(s) that；而that在主语从句中不充当任何成分，只起连接作用。 What That What that that Discover useful structures: Subject clauses 为了使句子保持平衡，常用it来代替主语从句，而把主语从句放到后面，尤其是连词that引导的主语从句常用于此种句式中。 常用句型如下： I ... ...
