Unit 2 Section Ⅲ Learning About Language-【新课程学案】2025-2026学年高中英语选择性必修第三册教师用书word（人教版）

本讲义聚焦高中英语动词不定式作主语这一核心语法点，通过“语篇实例导入→分类感知→规律归纳→对点练习”的学习支架，系统梳理不定式直接作主语、it作形式主语（不定式为真正主语）、“疑问词+不定式”作主语三种具体用法及谓语动词单三形式规则。 资料以“健康生活方式”语篇为情境载体，渗透文化意识，通过“先感知-会发现-明规则”环节培养思维品质，结合高考真题练习提升语言能力。课中助力教师分层教学，课后练习帮助学生巩固语法规则，查漏补缺，强化知识应用。

Section Ⅲ　Learning About Language 语法项目——动词不定式作主语 Develop a healthy lifestyle How to keep healthy① is always a concern for people. First of all, it is important for you to have② a light diet every day to maintain good health. Second, to go③ to bed early and get up early not only helps prevent diseases but also keeps you in good shape. Third, it’s wise of you to laugh④ more every day, which can help you improve your health through good emotional control. It’s important to follow⑤ good habits and keep a positive attitude. In addition, to exercise⑥ for half an hour every day can improve circulation and make your body healthier. Finally, to promote health, it is also an effective way to drink⑦ enough water every day. 　　[语法入门] ①疑问词how+动词不定式短语作主语; ②④⑤⑦动词不定式作真正主语,it在句中作形式主语; ③⑥动词不定式作主语。 一、不定式作主语　 　　[先感知] ①To clean the windows is today’s job. ②To jump out of the window is dangerous. ③To finish the work before Friday is not so easy. 　　[会发现] 1.句①②③中动词不定式短语在句中作主语,谓语动词采用第三人称单数形式; 2.句①②③中动词不定式短语都是具体的、一次性的或者具有将来含义的动作。 [明规则] 　　不定式(短语)作主语,句子谓语动词采用第三人称单数形式。动词不定式(短语)作主语通常表示具体的、一次性的或者具有将来含义的动作。 名师点津: 不定式作主语与动名词作主语的区别 　　一般来说,不定式作主语,表示具体的、一次性的或将来的动作;动名词作主语,表示一般的、泛指的或习惯性的行为。但是在多数情况下,不定式与动名词作主语没有明显的区别。例如,“眼见为实”这句谚语可以翻译成以下两种形式: To see is to believe.(不定式作主语) Seeing is believing.(动名词作主语) 　　[对点练]　(单句语法填空/完成句子) ①To finish (finish) reading the book will take you two hours.  ②To get/Getting(get) up early is beneficial for your health.  ③To love and to be loved is a happy thing in life.  爱与被爱是人生中一件幸福的事。 ④To equip yourself with enough skills is very important.  使自己具备足够的技能是非常重要的。 二、it作形式主语,不定式作真正的主语　 　　[先感知] ①It is interesting to play with snow in winter. ②It’s important for us to keep the water clean. ③It must be great fun to fly to the moon in a spaceship. ④It took me less than an hour to do my homework yesterday evening. 　　[会发现] 1.句①②③④中动词不定式在句子中均作真正的主语; 2.句①的句式结构为It is/was +adj.+to do sth.; 3.句②的句式结构为It is/was +adj.+for sb.+to do sth.;  4.句③的句式结构为It is/was +n.+to do sth.; 5.句④为“It takes/took/will take sb. some time to do sth.”句型。  [明规则] 　　it作形式主语,不定式作真正主语有三种情况: 1.It is/was +n.+to do sth.; 2.It is/was +adj.+for/of sb.+to do sth.; 3.It takes/took/will take sb. some time to do sth.。 　　[对点练]　 (单句语法填空) ①(2024·北京高考)It is a good option to write (write) about China’s fast economic growth.  ②(2024·北京高考)Lastly, it’s essential to mention (mention) China’s cultural prosperity.  ③(2025·全国Ⅰ卷写作)It would be a great opportunity for everyone to share(share) memorable moments through this column, as we can not only record our school days but also inspire others with our stories.  三、“特殊疑问词+不定式”作主语　 　　[先感知] ①How to use the computer is a question. ②Where to go has not been decided. ③When to start hasn’t been decided yet. ④Whether to drive or take a taxi is still a question. 　　[会发现] 1.句①②③中主语分别是How to use the computer,Where to go, When to start;  2.句④中主语是Whether to drive or take a taxi;  3.以上例句中谓语动词都是用的第三人称单数形式。 [明规则] 　　动词不定式也可与疑问词what, who, which, when, where, why, how或者连词whether等连用作主语。此时,句子谓语用第三人称单数形式。 　　[对点练] (1)单句语法填空 ①How to balance (balance) academic pressure and personal hobbies remains a challenge for many students.  ②Whether to compete in the relay race is (be) a decision that has to be made by our teacher. (2)句型转换 ③How to finish the work is still a question. →How the work should be finished is still a question.(用主语从句改写句子)  Ⅰ.用所给词的适当形式填空 1.It is a basic social custom to offer (offer) a cup of tea to them whenever guests visit.  2.It is common to tip (tip) the waiter in European countries.  3.It seemed selfish of him not to give (give) them anything.  4.It takes me one hour to finish (finish) the task.  5.As is known to all, to do (do) morning exercises is good for our health.  6.To realize (realize) this aim needs my constant hard work and the support from my families.  Ⅱ.语法与写作 1.(2024·新高考Ⅰ卷写作)It was a refreshing experience to create art surrounded by nature’s beauty.在大自然的美景中创作艺术是一种令人耳目一新的体验。  2.It is my great honor to stand here on behalf of my class and share my views on sportsmanship.  我很荣幸能站在这里代表我的班级,分享我对体育精神的看法。 3.To listen to the musician’s music is to experience Chinese musical traditions.  听这位音乐家的音乐是在体验中国音乐传统。 4.It is important to warm up and cool down properly before and after running.  跑步前和跑步后做适当的热身和放松运动很重要。 学科网（北京）股份有限公司 $