Unit 2 Healthy Lifestyle Ⅲ Learning About Language 课件（共47张）+学案（含答案）+练习（含答案）

Section Ⅲ　　Learning About Language 　　　(语法项目———动词不定式作主语) 初识语法———在美文运用中体悟　 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 is not only good for health and helps prevent disease 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., 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。 慧学语法———在归纳演绎中学通　 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_____，谓语动词采用_____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_____含义的动作。 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) ①_____ (finish) reading the book will take you two hours. ②_____(get) up early is beneficial for your health. ③_____ is a happy thing in life. 爱与被爱是人生中一件幸福的事。 ④_____ 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 more 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_____； 2．句①的句式结构为It is/was ＋_____＋to do sth.； 3．句②的句式结构为It is/was ＋adj.＋_____＋to do sth.； 4．句③的句式结构为It is/was ＋_____＋to do sth.； 5．句④为“It _____”句型。 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 _____ (write) about China's fast economic growth. ②(2024·北京高考)Lastly, it's essential _____ (mention) China's cultural prosperity. ③It was a rewarding experience for us _____ (realize) how closely plants and humans are related. ④It was a b ... ...