Unit 2 Healthy Lifestyle Discover Useful Structures 公开课导学案 -2023-2024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 导学案 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. 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 Killer1. To choose me is to choose illnesses. It's my job to ruin your lungs! If you are used to me, it is hard for you to live without me.--------smoking Killer2. My job is to meet people's taste needs. But my wish is not to make people fit. If you take me as your treat, it's really hard to quit!---------junk food killer 3. You need to look at yourselves to find me. You try to get much from me, but only to get tiredness and emptiness.-----staying up late You need to look at yourselves to find me. Adverbial My job is to meet people's taste needs. Predictive To choose me is to choose illnesses. It's my job to ruin your lungs! If you are used to me, it is hard for you to live without me. Subject StepⅡ Presentation 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. 5.How to go there has not been decided yet. Summary 1 1.动词不定式的位置：在位于动词之_______. 2.单个的动名词做主语，位于动词用______数。多个动名词做主语，谓语动词用_______数。 3.疑问词+不定式结构：与疑问词who, whom, whose, what, which, when, where, how等连用 4.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