UNIT 5 Section Ⅱ（课件PPT）-【精讲精练】2026-2027学年高中英语选择性必修第一册（人教版）

该高中英语课件聚焦Unit 5“人与社会之研究之伟大成就”主题，核心讲解主语从句，涵盖定义、引导词、it作形式主语、语序时态及谓语单复数等要点，通过即时演练和随堂演练搭建学习支架，帮助学生衔接前后语法知识。 其亮点在于融合高考真题例句与主题语境，以“定义-引导词-句式转换”分层讲解提升语言能力，结合课文感想写作培养思维品质。即时演练分步骤设计助力学习能力发展，学生能系统掌握语法，教师可高效开展教学。

Unit 5　Working the Land 主题语境——人与社会之研究之伟大成就 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land Section Ⅱ　Learning About Language 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 目 录 01 CONTENTS 03 语法精讲·技能培养 课时作业·知能达标 02 随堂演练·巩固提升 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 语法精讲·技能培养 01 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land That she could come to help us Whether she comes or not 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land whoever That Which when What 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land It surprised us that It hasn't been decided yet whether It is known to us all 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land was that has been decided 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land remains are is 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 随堂演练·巩固提升 02 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 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. 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 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. 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land what moves me most is 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land what makes him a great agriculturist is his intense effort to I think it is important that we should study hard whether we can succeed depends on overcome kinds of difficulties 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 谢谢观看 返回目录 英语·选择性必修 第一册(配RJ版) 1 Unit 5　Working the Land 主语从句 一、主语从句的定义 在复合句中充当主语的从句叫作主语从句。 What impresses me most is his famous philosophy of life.(2023·全国甲卷，书面表达) 给我印象最深的是他那著名的人生哲学。 It worried the mother that her son was always playing computer games. 儿子总玩电脑游戏，这位母亲对此很担心。 二、主语从句的引导词 1．连接词that和whether/if (1)that在从句中不充当任何句子成分，本身无任何意义，只起连接作用，但不可省略。 That we should develop a healthy lifestyle is crucial. 我们应该养成健康的生活方式， 这很重要。 (2)whether/if在从句中不充当任何句子成分，起连接作用，意为“是否”，不可省略。 Whether the plan will be carried out is still unknown. →It is still unknown whether the plan will be carried out. 这个计划是否会实施还不知道。 whether引导主语从句时，既可直接位于句首，也可以位于句末；if引导主语从句时只能用于it作形式主语的从句中。　 [即时演练1]　完成句子 ①她能来帮助我们使我们很高兴。 ______________________________ made us very happy. ②她来不来都关系不大。 ________________________ doesn't matter too much. 2．连接代词(who, whom, whose, what, which, whatever, whichever, whoever, whomever等) 连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。 Who will win the first is difficult to guess, because the two players are equal with each other. 谁会赢得比赛很难猜测， 因为两位选手平分秋色。 Whoever shows great interest in cycling is qualified to participate in the competition. 无论谁对骑行感兴趣都有资格参加比赛。 Whatever you do in your spare time should do no harm to others. 你在业余时间做的任何事情都不应该伤害其他人。 who 引导的主语从句表示一件“事情”，而whoever引导的主语从句指“人”。　 3．连接副词(when, where, why, how等) 连接副词引导主语从句并在从句中作状语。 Where you should go can be a hard decision to make in vacation planning.. 去哪里度假可能是假期计划中最难做出的决定。 When the delayed flight will take off depends much on the weather. 延迟的航班什么时候起飞主要取决于天气状况。 How this happened is not clear to anyone. 这件事是怎样发生的，谁也不清楚。 名词性从句引导词的确定步骤： (1)分析句式结构，明确名词性从句在句中的功能； (2)明确名词性从句所表达的意义； (3)明确名词性从句中所需要的成分及意义； (4)确定从句的连接词。　 [即时演练2]　用适当的引导词填空 ①For example, _______ breaks the traffic rules should be punished. ②____ people cut down too many trees destroyed the balance of nature. ③_____ part of the country he will travel to needs discussing. ④Exactly ____ the potato was introduced into Europe is uncertain, but it was probably around 1565. ⑤____ had seemed like an impossible task has now been accomplished.(2024·浙江1月卷，读后续写) 三、it作形式主语的主语从句 当句子主语过长时，为保持句子平衡，避免头重脚轻，常把主语从句后置，而把形式主语it放在句首。it作形式主语时常用于以下句型： 句型 说明 It＋系动词＋形容词＋主语从句 常用于此句型的形容词有important，(un)likely，possible，necessary，natural，wrong等 It＋系动词＋名词(词组)＋主语从句 常用于此句型的名词(词组)有a fact，an idea，an honour，a wonder，no wonder，a pity等 It＋系动词＋过去分词＋主语从句 常用于此句型的过去分词有known，proved，said，decided，suggested，thought等 It＋不及物动词＋主语从句 常用于此句型的不及物动词有appear，happen，seem，occur，matter等 It is very important that a student (should) learn English well. 学生学好英语很重要。 It is suggested that the meeting(should) be put off. 有人建议会议延期召开。 It depends on the weather whether they are going shopping today. 他们今天是否去购物还得看天气情况。 [即时演练3]　句式转换 ①That he suddenly fell ill last month surprised us. →____________________ he suddenly fell ill last month. ②Whether they will sell the house hasn't been decided yet. →__________________________________ they will sell the house. ③That English is widely spoken in the world is known to us all. →_____________________ that English is widely spoken in the world. 四、主语从句的语序和时态问题 1．主语从句和其他名词性从句一样必须使用陈述语序，尤其是当主语从句是疑问词引导的时候，主语从句的语序仍须使用陈述语序。 Who/Whom he will go to Beijing with remains unknown. 他将和谁一起去北京还不知道。 2．主语从句的时态需要根据具体语境来确定，尤其是当when引导主语从句的时候，会和when引导的时间状语从句混淆而误用现在时表将来。 When he will come back is still unclear. 他什么时候回来还不清楚。 [即时演练4]　单句语法填空 ①What surprised me most ___ (be) that he failed in the exam which was very easy. ②It has been found ____ plastics can be widely used in industries. ③When and where the meeting will be held ________________ (decide) already. 五、从句作主语时谓语动词的单复数 从句作主语相当于名词，和非谓语动词的动词­ing形式或者不定式作主语一样看作单数，句子谓语应该使用单数形式。what引导的主语从句，谓语动词通常用单数，但所指的具体内容是复数意义时，谓语动词可用复数形式。 That you don't like him is none of my business. 你不喜欢他不关我的事。 What the doctors really doubt is whether my mother will recover from the serious disease soon. 医生们真正怀疑的是我妈妈是否不久就能从这场重病中恢复过来。 What are often regarded as poisonous fungi are sometimes safely edible. 通常被认为有毒的真菌有时可以安全食用。 [即时演练5]　单句语法填空 ①Whether it will do us harm or good _______ (remain) to be seen. ②What are used as chief building materials today ___ (be) steel and concrete. ③What makes it different from others __ (be) that the vegetables here are grown without any chemical fertilizer. Ⅰ.把下列每题中的两个简单句合并为一个含有名词性从句的复合句 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. →______________________________________________________________ Ⅱ.学习“A Pioneer for all People”这篇课文后， 你有何感想？ 谈谈你的收获， 至少使用三个主语从句 Firstly, 1._____________________ (最让我感动的是)Yuan Longping's determination to tackle the crisis of the serious shortage of food and his dream to feed more people in the world. Not only should we care about ourselves, but also we should care about others. Secondly, 2._______________________________________________________ ___________________________ (使他成为伟大的农学家的是他克服各种困难的不懈努力). As a student, 3._______________________________________________ (我认为我们应该努力学习是重要的) and never give up when facing difficulties. Last but not least, 4._________________________________ (我们能否成功取决于) whether we devote ourselves to our work. $