Unit 2 Healthy Lifestyle-Discover Useful Structures 公开课教案 -2022-2023学年高中英语人教版（2019）选择性必修第三册

2019新人教高中英语选择性必修三Unit2 Healthy Lifestyle Discover Useful Structures公开课教案 Teaching aims: 1.Enable students to master the usage of the infinitive as the subject. 2.Guide students to use the relevant grammar flexibly and authentically in real situations. 3.Help students to understand the difference between the infinitive as the subject and the v-ing form as the subject. Teaching key points: 1. Help students identify the usage of the infinitive as the subject. 2. Guide students to use the infinitive as the subject to express their own ideas. 3. Design specific situations for students to make use of the infinitive as the subject. Teaching difficult points: How to use the infinitive as the subject in real situations. Teaching procedures: StepⅠLead-in Activity 1　Look at the following sentences and pay attention to the italicized infinitives,and tell their meanings and functions. 1.To change bad habits is never easy. 2.It took the surgeon three hours to finish my mother’s lung surgery. 3.To join the People’s Liberation Army,it is required for men to shave off their beards. 4.It was not polite to disturb your neighbours with loud music last night. The infinitive in each sentence functions as 　　　　　.  Summary 1:meanings and functions of the infinitive of the verb as the subject. Suggested answer: Summary 1:动词不定式在句中作主语,有时为了保持句子的平衡,避免头重脚轻,常用it作形式主语,而真正的主语放在句子的末尾。比如第2、3、4例句。 Activity 2　Find more infinitives in the reading passage. Suggested answers: 1.I can be easy for some of them to form bad habits. 2.After all,it is not easy to break bad habits. StepⅡ Self-directed study Activity 1　Fill in the blanks using the right form of the word,and try to change it into another sentence pattern. 1.It is important 　　　　　Tom to get that job.  It is kind 　　　　　you to help me with my homework.  2.　　　　　(talk) with him is a great pleasure.→It is 　　　　　　　　　　　　.  3.　　　　　(help) others is our duty.→　　　　　　　　　　　　　　　.  4.It took Tom 2 hours 　　　　　　　　　　　　　　　.(作准备)   Suggested answers: Activity 1 1.for;of