Unit 5 Working the Land Discover Useful Structures 课件-2025-2026学年高中英语人教版选择性必修第一册

该高中英语课件聚焦名词性从句中的主语从句，系统讲解其引导词选择、陈述语序、形式主语用法及主谓一致规则。课堂导入从句子类型分类切入，先复习复合句中的名词性从句分类，再聚焦主语从句，搭建从整体到局部的学习支架，帮助学生建立语法知识脉络。 其亮点在于采用“例句呈现-表格总结-分层练习”的教学方法，结合思维品质（分析从句成分、逻辑判断引导词）和语言能力（规范语序和表达）。例如通过表格对比that、whether等引导词的成分与用法，帮助学生系统归纳规律。学生在练习中提升语法应用能力，教师可借助结构化内容高效实施教学。

Unit 5 Discovering Useful Structures In this class we will Identify subject clauses, choose proper leading words and arrange correct word order of subject clauses. Follow the rule of Subject-Predicate Agreement when using subject clauses. To learn how to identify the uses of noun clauses To have students practice what they have learnt about noun clauses to make a presentation Learning objectives Step I Lead-in 句子类型 简单句 并列句 复合句 主句 从句 状语从句（副词性从句） 定语从句（形容词性从句） 名词性从句 主语从句 宾语从句 表语从句 同位语从句 Step II Presentation Underline the subject in each sentence. 1. Researchers are hoping to find a cure for the disease. 2. She went out in a hurry. 3. Four plus three is seven. 4. To see is to believe. 5. Smoking is bad for health. 6. What he said is true. 名词 代词 数词 动词不定式 动名词 主语从句 Summary: 主语是句子中说明人或事物的词，一般放在__________。在句子中充当主语的从句称为___________。 句首 主语从句 Step II Presentation That she was chosen made a tremendous stir in her village. Why the woman was murdered is still a question. Whether it will do us harm remains to be seen. It doesn't make any difference where you came from. When you can make it depends on your efforts. Summary: 主语从句：由一个句子充当主语成为主语从句。 1. 位置： 2. 语序： 句首 陈述语序 Step II Presentation That she was chosen made a tremendous stir in her village. Why the woman was murdered is still a question. Whether it will do us harm remains to be seen. It doesn't make any difference where you came from. When you can make it depends on your efforts. Which film we will watch is still a question. What he said is not important. Circle the leading words. Step II Presentation That you are coming to London is a good news to us． That the seas are being overfished has been known for years. Summary 引导词 成分 意义 省略 that 无 无 不能 Step II Presentation Whether we will go for an outing tomorrow remains unknown. Whether you can make it depends on your effort. Summary 引导词 成分 意义 省略 whether 无 是否 不能 Step II Presentation Who should be responsible for the accident is unknown. Whom they will choose is a secret. Whose grades are better is coming out soon. Which film we will watch is still a question. Summary 引导词 成分 意义 省略 who 主语 谁 不能 whom 宾语 谁 whose 定语 谁的 which 定语 哪一个 Where we will spend our holiday has not been decided. When you can make it depends on your efforts. Why they didn't come is still unknown to us. How you think and act will influence your life. Step II Presentation Summary 引导词 成分 意义 省略 where 地点状语 在哪里 不能 when 时间状语 在什么时候 why 原因状语 什么原因 how 方式状语 怎么；怎样 Whoever pollutes the environment should be punished. Whatever she did was right. Whichever of you wins will receive a prize. Step II Presentation Summary 引导词 成分 意义 省略 whoever 主语 无论谁 不能 whatever 宾语 无论什么 whichever 主语 无论哪一个 What surprised me was why he did that. What he said is pure nonsense. What your telephone number is remains a mystery. Step II Presentation Summary 引导词 成分 意义 省略 what 主语 宾语 表语 所...的是 什么 什么... 不能 Step II Presentation Summary 连接词 类别 说明 that; whether 从属连词 1. 不做成分； 2. 起连接作用 who; whom; what; which; whose; whoever; whatever; whichever 连接代词 充当主语, 宾语, 表语, 定语等成分 when; where; why; how 连接副词 充当时状, 地状, 原因状,方式状等成分 Step II Presentation __________ he didn’t attend the meeting is strange. __________ she likes concerns me. __________ stole that book will be punished. 第一步：找从句，看是否缺成分 第二步：不缺成分----that/whether That 第三步：缺成分----主、宾、定、表 who/ whom/ what/ which/ whose/ wh-ever 第四步：缺成分----状 when/ where/ why/ how What Whoever Step III Exercise 1. __________ to solve this question is unkonwn to us. 2. __________ he quit his high-paying job is not difficult to understand. Hewanted to start up his own business. 3. __________ the new chemical pesticide is effective remains to be seen. 4. __________ he made an important speech at the meeting was true. 5. __________ he said was right. 6. Every year, __________ makes the most beautifiul kite will win a prize inthe Kite Festival. 7. Your support is important to our work. __________ you did helped us a lot. 8. __________ will be our monitor hasn't been decided yet. 9. It is uncertain __________ he can come to Jenny's birthday party or not. How Why Whether That What whoever What Who whether Step IV Presentation 1. That light travels in straight lines is known to us all. 2. When the plane is to take off has not been announced. It is known to us all that light travels in straight lines. It has not been announced when the plane is to take off. Summary: 由连接词that引导的主语从句，为避免头重脚轻，大多数情况下会把主语从句放在句子后免，而用_____充当形式主语。 it Step IV Presentation 1. It is a common knowledge that the whale is not a fish. 2. It is a pity that you missed the film. Summary: It is + 名词 +主语从句 1. It is a fact that... 事实是... 2. It is a pity that... 很遗憾... 3. It is no wonder that... 难怪... 4. It is a good idea that... ...是一个好主意 Step IV Presentation 1. It is essential that he should be here by the weekend. 2. It is clear that they badly need help. Summary: It is + 形容词 +主语从句 1. It is necessary that...(should)+V.原 ...是必须的 2. It is obvious that... ...是明显的 3. It is likely that... ...是可能的 4. It is unusual that... ...是不寻常的 Step IV Presentation 1. It is thought that he is the best player. 2. It is suggested that students (should) finish their essay at school. Summary: It be + 过去分词 +主语从句 1. It is suggested that...(should)+V.原 人们建议... 2. It is announced that...(should)+V.原 据宣称... 3. It has been proved that... 已证明... 4. It is said that... 据说... Step IV Presentation 1. It seems that they will win the game. 2. It happened that I saw him yesterday. Summary: It +不及物动词 +主语从句 1. It seems that... 似乎... 2. It happened that... 碰巧... 3. It appears that... 似乎... 4. It occurred that... 碰巧发生... Step IV Presentation 1. Where had she gone is still unknown to us all.( ) 2. Where she had gone is still unknown to us all.( ) √ 1. What he saw both surprised and frightened him.( ) 2. What did he see surprised and frightened him.( ) √ Summary: 主语从句的语序为___________。 陈述语序 Step IV Presentation 1. Whether he is coming is still unknown to us all. 2. Whether he is coming or not is still unknown to us all. Summary: whether引导的主语从句，可以转换为_____为形式主语的句子，whether可以和_____互换。 如果主语从句中有__________，则不能与if互换。 it It is still unknown to us all whether/if he is coming. if or not Step V Exercise 1. It is suggested 　　　　　　 sunscreen should be applied every one to two hours in a sunny day.  2. 　　　　　　　　　　　　 I’m concerned  about most is whether we can collect a huge amount of information in such a short time. 3. 　　　　　　　　　　　　 we need  more food depends on how many people turn up. 4. 　　　　　　　　　　　　 the new  road is open to traffic has not been made clear. 5. Whether it will do us harm or good 　　　　　　(remain) to be seen.  that What Whether When remains Step V Exercise 6. What are used as chief building materials today 　　　　(be) steel and concrete.  7. What makes it different from others 　　　　　　　　　　(be) that the vegetables here are grown without any chemical fertilizer.  8. For example, 　　　　　　　　　　　  breaks the traffic rules should be punished. 9. 　　　　　　　　　　　　 people cut down too  many trees destroyed the balance of nature. 10. 　　　　　　　　　　　　 part of  the country he will travel to needs discussing. are is whoever That Which Step V Exercise 1.Why did they suddenly disappear? It still remains a mystery. →　　　　　　　　　　　  2.He said a lot at the meeting. His words were very attractive. →　　　　　　　　　　　  3.It was a pity. You missed such a good lecture. →　　　　　　　　　　　  4.We should practise oral English for an hour every day. It is our rule. →　　　　　　　　　　　  5.Shall we go picnicking tomorrow? It depends on the weather. →　　　　　　　　　　　  Why they suddenly disappeared still remains a mystery. What he said at the meeting was very attractive. It was a pity that you missed such a good lecture. It is our rule that we should practise oral English for an hour every day. Whether we will go picnicking tomorrow depends on the weather. Thank you! $