人教高中英语必修3unit4主语从句(17).pptVIP

A sentence serving as subject is called Subject Clause. （充当主语的句子） What you said is right. 你说的话是对的。 That he is the best student in our class is obvious. 他是我们班学习最好的学生，这是显而易见的。 Who will go makes no difference. Which is the best is not certain. Why dinosaurs died out is still unknown. When we will get together has not been decided. How she can keep healthy is a secret. Whether he will come is not very important. Who will go Which is the best Why dinosaurs died out When we will get together How she can keep healthy Whether he will come 主语从句通常位于句首主语的位置 主语从句三要素 he became a great scientist is known to us all. what you told me is true. 谓语动词一般用单数 从句用陈述语序 不能省略关联词 How 引导主语从句的关联词有三类：1) 从属连词that e.g. That the earth travels around the sun is a common sense.地球围绕太阳转，这是个常识。 NOTE: that 不可省，无意义，起连接作用；从句结构完整。 2)?从属连词whether e.g. Whether he’ll come here isn’t clear.?? 他是否会来这里还不清楚。 3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever, 连接副词 where, when, how, why，例如： What she did is not yet known.?? 她干了什么尚不清楚。How this happened is not clear to anyone. 这事怎样发生的, 谁也不清楚。Whoever comes is welcome.?? 不论谁来都欢迎。 4)有时用it作形式主语，将主语从句后置, 这样做是为了避免句子头重脚轻，常用句型如下： (1) It is +形容词/名词+ that 从句，如： It is a pity/ shame that… 遗憾的是… It is possible/ likely that… 很可能… It is obvious that… 很明显… (2) It +不及物动词+ that 从句，如： It seems/appears that…. 似乎… It happened that… 碰巧… (3) It + be + 过去分词 + that 从句 It is said that … 据说 … It is known to all that … 众所周知… It is reported that … 据报道… It is believed that … 人们相信… It is suggested that … 有人建议… It must be pointed out that … 必须指出… (1). It worried her a bit ___ her hair was turning gray. A. whether B. that C. what D. when (2).What I say and think ___ none of your business. A. is B. are C. has D. have (3). ____makes this shop dif