Unit 1 Food matters Grammar and usage (II)教案-2023-2024学年高中英语译林版(2020)选择性必修第一册

Unit 1 Food matters Grammar and usage (II) To-infinitives as subjects and predicatives · 内容分析： 本板块围绕单元话题,引导学生在有关“外出就餐和在家做饭”的语篇中观察、探究动词不定式做主语和表语的用法，并自主归纳其核心规则；再让学生通过句子、语篇两个层面练习巩固所学、内化新知。 · 教学目标： By the end of this section, students will be able to: 1. identify the use of to-infinitives as subjects and predicatives; 2. work out the rules of to-infinitives used as subjects and predicatives; 3. use the right forms of to-infinitives to finish tasks of rewriting sentences and completing a magazine article; 4. apply to-infinitives in new situations. · 教学重难点： 1. To summarize the general rules; 2. To apply the rules correctly and properly. · 教学过程： Step 1 Revision · 动词不定式作主语 1. 动词不定式具有名词特征，可充当主语。（做主语时谓语动词用单数形式） To see is to believe. 眼见为实。 To say is one thing and to do is another. 说是一回事，做又是另一回事。 注：单个不定式作主语时，谓语动词用单数形式；两个及以上不定式作主语时，谓语动词用复数形式；但作为一个整体时，谓语动词用单数形式。 到哪里去度假以及何时去度假还没有决定。 Where to go on a holiday and when to go for the holiday ______ (decide). 到哪里去，何时去度假还没有决定。 Where and when to go on a holiday________ (decide). 答案： have not been decided has not been decided 2. 动词不定式句子的主语时可以用形式主语it代替，将不定式置于句末，平衡句子结构。 It is a shame to litter. 乱扔垃圾可耻 It is a privilege to meet you. 认识你很荣幸 3. it 作为形式主语时，常见句型。 It + be +adj. + (for sb) to do sth (adj 修饰物) It + be +adj. + (of sb) to do sth (adj 修饰人) It + be + n. + to do sth It takes/ took/ will take sb some time/money to do sth 4. 动词不定式句子的主语时, 若其后面需要用动词作表语时，则作表语的动词也最好使用不定式形式，保持形式一致 (to do is to do) To save me is to save yourself. 救我也是救你自己。 动词不定式句子的主语时, 会有时态、语态的变化。 It is a great honor for me to be invited here today. 今天我很荣幸被邀请到这里。 Her birthday party is to be held next Friday. 她的生日将于下周五举行。 · 动词不定式作表语 1. 动词不定式做表语直接用在系动词之后，起解释说明的作用，其主语通常是 aim, ambition, dream, duty, goal, idea, intention, plan, purpose, task, way, wish等表示意向、打算、计划的词。 Her wish is to be a teacher. 她的愿望是当一名教师。 The duty of soldiers is to defend their country. 军人的职责是保卫祖国。 2. 动词不定式做表语用在seem, appear, remain, prove, turn out等之后： Several problems remain to be settled. 有几个问题有