(
课件网) Unit 2 Healthy Lifestyle 3.Learning About Language (2):Structures 问题驱动 To exercise every morning is good for us. 图片来源：https://mp.weixin./s To keep a balanced diet is important for a healthy life. 思考探究 讨论释疑 巩固检测 总结提升 展示评价 1.To exercise every morning is good for us. 2.To keep a balanced diet is important for a healthy lifestyle. Summary 1: 动词不定式直接作_____，位于_____，谓语动词用_____， 结构是：_____。 主语 句首 单数 use infinitive as the subject infinitive +predicative verb+ other parts 讨论释疑 思考探究 巩固检测 总结提升 展示评价 It is important to keep a balanced diet and do exercise regularly. To keep a balanced diet and do exercise regularly is important. 问题：当不定式短语较长时，句子会“头重脚轻”，怎么办？ 用 it 作形式主语，放在句首，把真正的主语 — 动词不定式置于句后。 主语 思考探究 讨论释疑 巩固检测 总结提升 展示评价 1.It is beneficial to listen to music when you feel anxious . 2.It is useful to talk with friends when you are unhappy. Summary 2:例句中的结构是_____。在此结构中常用it作 _____ ,而把动词不定式短语(真正主语)后置，为了避免句子头重脚轻。 It + be + adj. + to do sth 形式主语 真正主语 形式主语 positive attitue 思考探究 讨论释疑 巩固检测 总结提升 展示评价 You are wise to avoid junk food . 1.It is wise of you to avoid junk food. 2.It is important for us to drink enough water. To drink enough water is important for us. Summary 3: 若adj. “描述人的性格、品质”, 用of,如 kind, silly, polite, foolish等。 若adj.“描述事或行为的特征”, 用for, 如easy, difficult, possible, important等。 结构：It + be + adj. （for/of ) sb + to do sth diet 图片来源：AI豆包生成 思考探究 讨论释疑 巩固检测 总结提升 展示评价 1.It is good _____ us to eat fresh fruits and vegetables. 2.It is careless _____ him to skip breakfast. of for Fill in the blank by using for/of 图片来源：AI豆包生成 思考探究 讨论释疑 巩固检测 总结提升 展示评价 Summary 4: 由以上的句子可看出，这里采用了_____的结构，此结构中的名词多是_____名词。常见名词有：pity, shame, pleasure, honour等。 It is an honour to share practical tips about running. It is my duty to teach teenagers exercise scientifically. It is a shame to give up regular exercises. It + be +a/an+ n. + to do 抽象 形式主语 真正主语 抽象名词 sports 图片来源：AI豆包生成 思考探究 讨论释疑 巩固检测 总结提升 展示评价 1.It takes me 30 minutes to do yoga every evening. 2.It took him lots of energy to climb the mountain. 3.It will take them some money to buy sports equipment. Summary 5 : It takes / took / will take sb. time / money / energy to do sth. 花某人时间/金钱/精力做某事 思考探究 讨论释疑 巩固检测 总结提升 展示评价 Summary 6: 动词不定式与疑问词who, whom, whose, what, which, when, where, how等连用构成_____，可作主语，谓语动词用单数形式。 1. When to go to bed is a key question for teens. 什么时候睡觉对青少年们来说是个关键问题。 2.Whether to get enough sleep affects teenager’s health. 是否能获得足够的睡眠影响青少年的健康。 3. How to avoid ... ...
