Unit 5 Working the land 语法(主语从句)导学案-2026-2027学年人教版高中英语选择性必修第一册

该高中英语导学案聚焦Unit5 Working the Land的主语从句语法，系统讲解定义、三大类引导词（that/whether/特殊疑问词）、It作形式主语及易错点。课堂导入结合单元农业主题，通过袁隆平相关例句衔接复合句基础，搭建从基础定义到形式主语句型的学习支架。 资料亮点在于话题与语法深度融合，练习紧扣农业场景（如粮食安全、农民技术需求）提升语言能力。分层次练习（填空、改写、汉译英）需分析与创造，培养思维品质。易错点汇总及答案解析助力掌握策略，提升学习能力，适合课堂教学与自主学习。

Unit5 Working the Land语法讲解与练习 语法:主语从句详细讲解 一、核心语法精讲：主语从句 1. 主语从句基本定义 定义：在复合句中充当主语的从句，叫作主语从句。 核心句式：引导词 +完整从句 充当整句主语，谓语动词多用单数形式。 两大位置：① 句首主语 ② It 作形式主语 2. 三大类引导词 （1）that 引导的主语从句（陈述事实、真理、研究结论） 用法：that 无词义、不充当成分，只起连接作用；句首that不可省略；从句为完整陈述句。 单元例句：That hybrid rice increases grain output benefits the whole world. 逐句解析： ① That hybrid rice increases grain output 是整句主语； ② 从句结构完整，that 仅连接，无含义； ③主语从句视作单数，谓语动词用 benefits。 例句：That science and technology change our life is beyond doubt. 逐句解析： ① That science and technology change our life 是整句主语； ② 从句结构完整，that 仅起连接作用，无含义； ③ 主语从句视作单数，谓语动词用 is。 句意：科技改变我们的生活，这是毋庸置疑的。 （2）whether / if 引导的主语从句（表疑问、不确定） 必考规则：句首只能用whether，不能用if 单元例句：Whether new farming techniques will be widely used remains to be seen. 解析：whether 引导主语从句表不确定性，整个从句作主语，谓语remains用单数； 句意：新技术是否会被广泛应用还有待观察。 if 例句（it 作形式主语，从句放后面） It is not clear if they will accept our suggestion. 解析：if 引导真正的主语从句，表不确定；it 为形式主语，从句后置，此处可以使用 if； 谓语用 is； 句意：他们是否会接受我们的建议还不清楚。 补充对比句（句首，只能用 whether）： Whether they will accept our suggestion is not clear. （3）特殊疑问词引导的主语从句（what/who/where/when/why/how） 用法：疑问词有词义、在从句中充当成分（主/宾/状），不可省略；从句必须用陈述语序。 例句1: What Yuan Longping did for agriculture deserves our highest respect. 解析：what 在从句中作did的宾语，指代“所做的事”；整个从句作主语，谓语deserves用单数；句意：袁隆平为农业所做的一切值得我们至高的敬意。 例句2:Who will take charge of the project hasn’t been decided yet. 解析：Who 在从句中作主语，指代 “那个人”；整个从句作句子主语，谓语用 hasn’t been decided； 句意：谁将负责这个项目还没有被决定。 例句3: How we can improve our learning efficiency is worth discussing. 解析：How 在从句中作方式状语，表示 “如何”；整个从句作主语，谓语用 is； 句意：我们该如何提升学习效率值得探讨。 3. 高频重点结构：It 作形式主语 当主语从句过长，为避免头重脚轻，用 It 作形式主语，真正主语从句后置。 四大固定高频句型 *It is + adj. (clear/obvious/true/possible) + that从句 例句：It is obvious that modern farming improves grain production. 解析：It为形式主语，真正主语是that引导的完整从句。 *It is +名词 (a fact/a pity/a wonder) + that从句 例句：It is a fact that the environment is changing rapidly. 翻译：环境正在快速变化，这是一个事实。 *It +不及物动词 (seems/appears/happens) + that从句 例句：It seems that he has made great progress in his studies. 翻译：似乎他在学习上取得了很大进步。 *It is + believed/reported/known + that从句（被动句型） 例句：It is reported that many young people take parttime jobs nowadays. 翻译：据报道，现如今很多年轻人做兼职。 4. 必考易错点汇总 ✅ 主语从句作主语，谓语动词默认单数 ✅ 句首主语从句的 that 绝对不能省略 ✅ 主语从句一律用陈述语序，不倒装 ✅ 主语从句放句首表“是否”，只用whether不用if ✅ what在从句必须充当成分，that不充当任何成分 5. 单元话题经典例句复盘 How farmers improve soil quality is worth studying.（农民如何改善土壤质量值得研究。） That hard work feeds the world inspires every young person. （辛勤劳作养活世界这一事实激励着每一个年轻人。） 二、专项配套练习 大题一：用正确引导词填空 从 that / whether / what / who / which / where / when / why / how 中选择合适引导词填空 1. ________ Yuan Longping devoted his life to agriculture moved the whole nation. 2. ________ we can produce more grain is a key problem for food security. 3. ________ farmers need most is advanced and practical farming technology. 4. ________ will take over agricultural research in the future remains unknown. 5. It is clear ________ modern farming methods increase crop output greatly. 6. ________ the rice grows best depends on temperature and water. 7. ________ he refused to give up research led to his final success. 8. It remains a question ________ traditional farming will disappear completely. 9. ________ we protect farmland is of great importance to future generations. 10. ________ new agricultural skills farmers have learned improves their productivity. 11. It is reported ________ hybrid rice has helped solve hunger problems worldwide. 12. ________ contributes to high grain yield deserves wide recognition. 13. ________ the scientist started his agricultural research is inspiring. 14. It is unknown ________ kind of crop will be planted in this field next year. 15. ________ we value farmers’ work shows our respect for labor. 16. No matter ________ difficulties they met never stopped their research. 17. It is a fact ________ hard work plays a key role in agricultural development. 18. ________ the farmland should be protected well is widely accepted. 19. ________ will lead the new agricultural project has not been decided yet. 20. ________ we can achieve sustainable agriculture needs continuous exploration. 21. ________ makes Yuan Longping a great scientist is his perseverance and love for people. 22. It is doubtful ________ dry land can produce high-yield crops. 23. ________ farming technology will develop in the future interests many researchers. 24. ________ we learn from senior farmers helps us improve planting skills. 25. ________ crops grow fast in rainy seasons is common sense. 大题二：句子改写 要求：将简单句合并/改写为含主语从句的复合句，句意不变 1. Yuan Longping devoted himself to hybrid rice research. This inspires us greatly. __________________________________________________________________ 2. Farmers work hard every day. This ensures stable food supply. __________________________________________________________________ 3. Can new technology improve crop quality? It is still being tested. __________________________________________________________________ 4. What do farmers need most? The researchers are trying to find it out. __________________________________________________________________ 5. Protecting farmland is very important. It is a truth. __________________________________________________________________ 6. Will traditional farming disappear? No one can tell for sure. __________________________________________________________________ 7. Modern science helps agricultural development. This is obvious. __________________________________________________________________ 8. How to increase grain yield is the main goal of their research. __________________________________________________________________ 9. A person’s love for agriculture makes him succeed in farming research. __________________________________________________________________ 10. We should respect farmers’ hard work. This cannot be denied. __________________________________________________________________ 大题三：汉译英（必须使用主语从句） 1. 袁隆平一生致力于杂交水稻研究是值得我们学习的。 ___________________________________________________________ 2. 农民最需要的是先进的种植技术与科学指导。 ___________________________________________________________ 3. 我们是否能够解决粮食问题至关重要。 ___________________________________________________________ 4. 现代农业技术可以提高粮食产量是众所周知的事实。 ___________________________________________________________ 5. 我们如何保护耕地需要全社会的共同努力。 ___________________________________________________________ 6. 是什么支撑这位科学家坚持科研至今令人敬佩。 ___________________________________________________________ 7. 未来谁来发展农业是一个值得思考的问题。 ___________________________________________________________ 8. 辛勤劳作能够创造丰收是不变的真理。 ___________________________________________________________ 9. 新技术是否适合贫瘠土地仍有待验证。 ___________________________________________________________ 10. 我们尊重农民的劳动彰显了社会的进步。 ___________________________________________________________ 11. 杂交水稻如何造福世界值得我们深入研究。 ___________________________________________________________ 12. 粮食安全如何保障是各国关注的重点。 ___________________________________________________________ 13. 科学家永不放弃的精神推动了农业的发展。 ___________________________________________________________ 14. 哪种种植方式更加环保仍在探索中。 ___________________________________________________________ 15. 农业能否持续发展取决于科技与耕耘。 ___________________________________________________________ Keys 大题一 1. That 2. Whether 3. What 4. Who 5. that 6. How 7. That 8. whether 9. How 10. What 11. that 12. What 13. Why 14. which 15. That 16. what 17. that 18. That 19. Who 20. Whether 21. What 22. whether 23. How 24. What 25. That 大题二 参考改写 1. That Yuan Longping devoted himself to hybrid rice research inspires us greatly. 2. That farmers work hard every day ensures stable food supply. 3. Whether new technology can improve crop quality is still being tested. 4. What the researchers are trying to find out is what farmers need most. 5. That protecting farmland is very important is a truth. / It is a truth that protecting farmland is very important. 6. Whether traditional farming will disappear cannot be told for sure. 7. That modern science helps agricultural development is obvious. / It is obvious that modern science helps agricultural development. 8. How we can increase grain yield is the main goal of their research. 9. What makes a person succeed in farming research is his love for agriculture. 10. That we should respect farmers’ hard work cannot be denied. 大题三 参考翻译 1.That Yuan Longping devoted his whole life to hybrid rice research is worthy of our learning. 2.What farmers need most is advanced planting technology and scientific guidance. 3.Whether we can solve the food problem is of great importance. 4.It is a wellknown fact that modern agricultural technology can increase grain output. 5.How we protect farmland requires joint efforts of the whole society. 6.What supports the scientist in sticking to scientific research is admirable. 7.Who will develop agriculture in the future is a question worth thinking about. 8.That hard work can create harvests is an unchanging truth. 9.Whether new technologies are suitable for barren land remains to be verified. 10.That we respect farmers’ labor shows the progress of society. 11.How hybrid rice benefits the world deserves our indepth research. 12.How food security can be guaranteed is the focus of all countries. 13.That scientists never give up promotes the development of agriculture. 14.Which planting method is more environmentally friendly is still being explored. 15.Whether agriculture can develop sustainably depends on technology and hard work. 2 / 2 学科网（北京）股份有限公司 $