人教版高中英语必修三单元四Unit4主语从句

1、一、定义主语从句是在复合句中作句子的主语。What I want is a new bicycle.我想要的是一辆新自行车。主语从句二、主语从句的引导词1. 连词that, whether(1)that在从句中不作成分,无词义,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。(2)whether在从句中不作成分,“是否”,不能省略Whether hell come isnt clear. 他是否会来还不清楚。2.连接代词who, what, which, whom, whose, （whoever, wha

2、tever, whichever）在从句中作主语、宾语、表语或定语,有词义Who will go makes no difference.谁去没有区别。Whoever comes is welcome. 不论谁来都欢迎。3. 连接副词 where, when, how, why在从句中分别作地点、时间、方式、原因状语。Why dinosaurs died out remains a puzzle.恐龙为什么会灭绝仍然是个谜。三、主语从句的两种结构(1)主语从句位于句首Why dinosaurs died out remains a puzzle.恐龙为什么会灭绝仍然是个谜。(2)主语从句位于句

3、尾，使用it作形式主语It is reported that the rain will stop tomorrow.据报道，明天雨会停。1.It+be+形容词+that从句It is certain that our Chinese Dream will come true some day. 我们的中国梦一定会实现。2. Itbe名词词组that从句(a pity, a fact, a shame, a question, an honour等)It is a pity that he didnt come to the party.可惜的是他没来参加晚会。3.Itbe过去分词that从句

4、(said, reported, thought, expected, believed等)It is said that Mr.Green has arrived in Beijing.据说格林先生已抵达北京。4.It不及物动词that从句(seem, happen等)It happened that I was out that day.碰巧那天我不在。5. Itdoesnt matter引导词引起的主语从句It doesnt matter whether she will come or not.她来不来不要紧。四、主语从句的注意事项1. 从句用陈述语序What I want is a

5、new bicycle.我想要的是一辆新自行车。2.主谓一致(1)主语从句作主语时，主句谓语动词多用形式，但what引导的主语从句，主句的系动词要与表语保持一致。What they need are books. 他们需要的是书。What they need is love. 他们需要的是爱。(2)有两个引导词引导的主语从句若表示一件事情，主句谓语动词应该用单数形式；若表示两件事情，主句谓语动词应该用复数形式。When and where he was born is not clear.他何时何地出生的还不清楚。When they will start and where they will

6、 go have not been decided yet.他们将在什么时间动身以及要去哪里还没有定下来。1. It is likely he is the winner of this game. 很可能他是这场游戏的胜利者。2. we will build a new high school hasnt been decided.我们是否要建新高中还没决定呢。3. breaks the law should be punished.不管谁违法都应该受到惩罚。thatWhetherWhoever4. he was born is unknown. 他生于何时还不知道。5. (你刚才告诉我的)

7、 was really a suiprise.6. (我们如何去那里) is a question.7. (他为什么哭) is not clear.WhenWhat you told me just nowHow we will go thereWhy he cries1. the delayed flight will take off depends on the weather.A. Why B. When C. That D. What2. Exactly the potato was introduced to Europe is uncertain, but it was prob

8、ably around 1565.A. Whether B.Why C. When D. HowBc3. makes the book so extrodinary is the creative imagination of the writer.A. That B. What C. Who D. Which4. one of you breaks the window will have to pay for it.A. Whoever B. Whatever C. Whichever D. WhereverBC5. _ wants to run a business in this district must get a permit from the government first. A. Who B. Whoever C. No matter who D. Those who B一、定义二、主语从句的引导词1. 连词that, whether2. 连接代词 who, what, which3. 连接副词 where, when, how, why三、主语从句的两种结构(1)主语从句位于句首(2)主语从句位于句尾