英语基础模块下册教案(18)

中职类英语基础模块下册教案

5.Tom told Bill not buy a new bake. 6.Did anyone see her enter the room? 7.I am looking for a room to live in. 8.She ate less to lose weight.

学生活动：学生翻译句子，体会不定式的作用。 说明： 通过复习，引入新课。 Step2 The Infinitive Study

教师活动：教师布置任务：不定式的结构？不定式在句子中所作的成分？ 学生活动：学生带着问题看书，总结，回答问题。

说明：引导学生运用观察、发现、归纳的方法学习语言知识，避免语法传授时的老师讲、学生记的片面现象。 Step3 Explanation

1. 作主语：The cat said, “To take roller coaster” is terrible.

不定式短语作主语时，可以直接放在句首，但在很多情况下，尤其是在疑问句和感叹句中，往往放在谓语之后，而用先行代词it作形式主语。

→ The cat said, “It’s terrible to take roller coaster.” How long did it take you to take roller coaster? How terrible it is to take roller coaster? 不定式作主语常见句型：

a) It is + adj. (easy, important, difficult ) + 不定式

b) It is + n. (a pity, a pleasure, one’s duty, a shame) + 不定式

eg. It’s my duty to teach you how to be a student of No.3 Middle School. c) It takes/needs/requires + some time (hours, months, days, patience ) + 不定式 eg. It requires patience to be a good teacher.

2. 作表语：当句子的主语是aim, idea, policy, question, suggestion, wish, task, duty, job, purpose等或者主语是what引导的名词性从句时，后面可以用不定式做表语，用以说明主语所包含内容。 eg. Our most important task now is to make a plan.