(共18张PPT)
Unit 2 Healthy Lifestyle
Discover Useful Structures
Step 1 Lead in
To change bad habits is never easy.
Activity 1 What are the functions of the underlined parts
It is not easy to break bad habits.
Subject
1. It took the surgeon three hours to finish my mother’s lung surgery.
2. To join the people’s Liberation Army, it is required for men to shave off their beards.
3. It was not polite to disturb your neighbors with loud music last night.
Translate the sentences into Chinese and discuss the functions of the underlined parts
Subject
1. To prevent harmful habits like these from dominating a teenager's life is essential.
2. To change bad habits is never easy.
It can be easy for some of them to form bad habits.
It is not easy to break bad habits.
Activity 2 Explore infinitive used as subject. (form, position)
1. 如何改变坏习惯是个问题。
2. 去哪儿还没有讨论。
3. 还没决定是否坐飞机去巴黎。
1. How to break the bad habit is a question.
2. Where to go has not been discussed.
3. It has not been decided whether to fly to Paris.
Beginning
End
Interrogative + to do
Infinitive phrases
Position
Form
Step 2 Explore
1. It took the surgeon three hours to finish my mother’s lung surgery.
2. To join the people’s Liberation Army, it is required for men to shave off their beards.
It was not polite to disturb your neighbors with loud music last night.
It is important to avoid passive cigarette smoking.
Activity 2 Explore infinitive used as subject. (function)
State a fact.
Give advice.
对于我们来说早起很困难。
你真的很善良帮我解决了这个问题。
1. It is difficult for us to get up early.
2. It is kind of you to help me deal with the problem.
Activity 2 Explore infinitive used as subject. (Compound infinitive)
To change bad habits ________ (be) never easy.
Activity 2 Explore infinitive used as subject. （Subject-predicate agreement）
is
Predicate--- Single form
To be working all day long is a bore.
To have made the same mistake twice is unforgivable.
To love and to be loved is the great happiness.
Continuous form of the infinitive
Perfect form of the infinitive
Passive form of the infinitive
Activity 2 Explore infinitive used as subject. (The tense and voice of the infinitive)
__________ (do) morning exercises regularly is good for your health.
It feels really good __________ (do) morning exercises today.
Doing
to do
Regular or habitual action
Specific action
Activity 3 Explore the difference between infinitive and gerund used as subject.
Activity 4 Join the words to make full sentences using the infinitive.
1. important/avoid/passive cigarette smoking.
It is important to avoid passive cigarette smoking.
2. will take/nutrition specialist/a balanced diet menu/make /an hour/for you.
It will take a nutrition specialist an hour for you to make a balanced diet menu.
3. useful/turn to/fitness consultant/for advice
It is useful to turn to a fitness consultant for advice.
4. illegal /dangerous/take /drugs
It is dangerous to take illegal drugs.
5. harmful/skip breakfast/often
It is harmful to skip breakfast often.
Some advice on healthy life
Step 3 Employ & Exceed
Activity 4 Join the sentences to make a paragraph. You can add your own sentences if necessary to make your paragraph more meaningful.
To get healthy and get rid of bad habits, sometimes it is also a good idea to get professional help. It will take an hour for a nutrition specialist to make a balanced diet menu for you. It is also useful to turn to a fitness consultant for advice.
You can also help yourself with some common sense. For example, it is harmful to skip breakfast too often. It is important to avoid passive cigarette smoking. And, of course, it is dangerous to take illegal drugs too.
Activity 5 Complete the conversations with the correct forms of the phrases in the box.
begin with be in control of make a choice decide on make up one’s mind
1. A: Hello, doctor. I want to lose weight, but I just can 't seem to do it. What can you do to help me
B : Well, first, it's necessary to ______________ what you eat. Cut out all fatty food and sugary drinks, and eat more fruit and vegetables.
2. A: I really need to _____________a way to exercise more. I could use a fitness app, but my phone's full.
B: So delete a few files. I'm sure the app doesn't take up much space.
be in control of
decide on
3. A: Before exercising, always do a few warm-ups to___________________.
B: I know. But then I always feel too tired to continue!
4. A: Should I go for the pizza or the fried chicken I hate _____________ like these. You know what —I'm going to eat both!
B: Wow！ Don't eat too much junk food-you'll get fat. I've actually _________________ to go on a diet, so I'll just stick to the fruit salad.
begin with
to make choices
made up my mind
1. What bad habits does he have
2. Why does he want to change the habit
3. What trouble him most？
It is easy for him to form bad habits.
It was foolish of him to spend plenty of time on his phone.
To study hard is his first task at the time, so it is necessary for him to make a change.
To change bad habits are not easy.
Activity 6 A post for help
Use habit cycle and infinitive forms to write some advice to reply the post.
Items ★★★★★
Topic words and phrases
Infinitives used as subject to put forward advice
Some proper conjunctions to make the article fluent.
Creativity
Homework
Polish your writing according to the checklist.
2. Answer these three questions according to your own situation：
1) What snacks do you like
2) How many days do you sleep for eight hours or more
3) What do you spend most your spare time doing
谢谢观看教学设计
本课时在本单元的作用 本课时为语法课，是本单元的第四课时。该板块延续了前一板块的话题，继续讨论健康的生活习惯，并对不良习惯提出相应改变建议，而常用来提出建议的典型结构之一便是用作主语的动词不定式，通过本课时的学习，学生们充分感受和理解语法结构，并能自如地使用所学结构提出改变不良习惯的建议，为下一课时Using Language的学习做了语言的铺垫。
本课时文本分 析 【What】描述各种健康问题及表达对应建议。 【Why】通过该语篇的学习，深化学生对目标语法的理解，为学生运用不定式做主语提供了参照文本。 【How】该语篇以对话形式呈现，语言简单，内容贴近学生的日常生活，对话中描述各种熟悉的健康问题，运用不定式做主语提出了相应建议。
学情分析 已有基础：学生在初中阶段和本套教材的前面册次已经学习过动词不定式作宾语、宾补、定语、状语等用法，学生在本套教材选择性必修第一册第三单元学习了动词的-ing形式作主语的用法。 预设困难：动词不定式做主语的形式、位置和功能以及不定式的复合结构；不定式做主语和动名词做主语的区别；正确运用不定式做主语提出建议。 解决办法：依据以语言运用为导向的“形式-意义-使用”三维动态语法观，通过对做主语的动词不定式形式的呈现，关注其形式和位置，通过观察、判断和理解Reading and Thinking中出现的表达建议和陈述事实的做主语的动词不定式，探究其意义，在真实语境中通过比较、分析并总结动词不定式做主语和动名词做主语的区别，最后创造新的语境---求助帖子，引导学生运用所学的动词不定式做主语为对方提出建议，让学生灵活使用所学结构。
教学重难点 教学重点：引导学生结合真实语境理解动词不定式做主语的形式、位置和功能。 教学难点：指导学生运用动词不定式做主语提出改变不良习惯的建议。
评价内容 与标准 评价内容：理解动词不定式做主语的意义和功能并在语境中正确使用。 评价标准：能否结合语境准确使用动词不定式做主语提出建议。
学习活动设计
单元 目标 课时 目标 活动形式 活动层次 效果评价 目标达成情况
2. 通过观察，归纳，能够利用思维导图建构呈现语篇信息，并能分析和归纳语篇中的重点话题目标词汇和句型，练习内化本单元话题目标语言及语法结构，并能在语境中正确使用。 1. 通过观察、分析和归纳，掌握动词不定式用作主语的表意功能。 Step 1 Lead in Activity 1 Observe two sentences from Reading and Thinking part, and discuss the functions of the underlined parts. Finish exercise 1. (Student Book p.17) 学习理解之感知与注意 通过观察学生对句子中动词不定式所充当的成分的分析，教师对学生的表现给予鼓励和帮助。 学生能够理解动词不定式做主语。
【设计意图】通过观察句子，初步感知动词不定式做主语的语法结构。
Step 2 Explore Activity 2 Explore infinitive used as subject. Explore infinitive used as subject. (form, position) 1) To prevent harmful habits like these from dominating a teenager's life is essential. 2) To change bad habits is never easy. 1) It can be easy for some of them to form bad habits. 2) It is not easy to break bad habits. 1) How to break the bad habit is the question. 2) Where to go has not been discussed. 3) It has not been decided whether to fly to Paris. Explore infinitive used as subject. (function) 1) It took the surgeon three hours to finish my mother’s lung surgery. 2) To join the people’s Liberation Army, it is required for men to shave off their beards. 3) It was not polite to disturb your neighbors with loud music last night. 4) It is important to avoid passive cigarette smoking. Explore infinitive used as subject. (Compound infinitive) It is difficult for us to get up early. It is kind of you to help me deal with the problem. Explore infinitive used as subject. (Subject-predicate agreement） To change bad habits ________ (be) never easy. Explore infinitive used as subject. (The tense and voice of the infinitive) To be working all day long is a bore. To have made the same mistake twice is unforgivable. To love and to be loved is the great happiness. 学习理解之获取与梳理、概括与整合 观察学生能否通过观察，归纳目标语法的结构，根据需要给予提示。 学生能够理解动词不定式做主语的形式，位置和功能。
【设计意图】通过这项活动引导学生概括和整合本单元的目标语法结构的基本用法。
Activity 3 Explore the difference between infinitive and gerund used as subject. __________ (do) morning exercises regularly is good for your health. It feels really good __________ (do) morning exercises today. 学习理解之获取与梳理、概括与整合 观察学生能否通过对比，归纳目标语法的结构与动名词做主语的区别，根据需要给予提示。 学生能够归纳动词不定式做主语和动名词做主语的区别。
【设计意图】引导学生对比，归纳目标语法的结构与动名词做主语的区别。
2.能够在真实语境中正确使用动词不定式做主语。 Activity 4 Finish exercise 2. (Student Book p. 17) 应用实践之内化与运用 观察学生能否写出正确的句子并连句成段，教师给予及时的指导。 大部分学生能够写出正确的句子并形成段落；部分同学句子的衔接能力有待提高。
Activity 5 Do exercise 3. (Student Book p. 17) 应用实践之内化与运用 观察学生能否结合语境正确使用词汇以及动词不定式做主语在对话中的应用，教师给予必要的帮助。 学生能够结合语境选出正确的词汇填空。
Activity 6 A post for help Use habit cycle and infinitive forms to write some advice to reply the post. 迁移创新之想象与创造 观察学生能否运用动词不定式做主语给网络求助帖子写建议；观察学生能否结合评价量表内容评判他人表现，教师给予及时的指导。 大部分学生能够运用所学目标语法提出建议，能给出相对合理的评价。
【设计意图】通过从词到句，从句到篇的意义构建过程引导学生深入体会动词不定式做主语的结构形式，培养学生灵活运用目标语法的能力。
作 业 设 计 Polish your writing according to the checklist. 2. Answer these three questions according to your own situation： 1) What snacks do you like 2) How many days do you sleep for eight hours or more 3) What do you spend most your spare time doing
板 书 设 计 Unit 2 Healthy Lifestyle Period 4 Discover Useful Structures Infinitive as the subject Position, form, function Compound Infinitive Subject-predicate agreement The tense and voice of the infinitive Difference between infinitive and gerund used as subject
教学 反思与改进 亮点：本课时设计依据以语言运用为导向的“形式-意义-使用”三维动态语法观，通过对做主语的动词不定式的呈现，关注其形式；通过观察、判断和理解Reading and Thinking中出现的表达建议和陈述事实的做主语的动词不定式，探究其意义，最后创造新的语境---求助帖子，引导学生运用所学的动词不定式做主语为对方提出建议，让学生灵活使用所学结构，检测学生对目标语法的掌握情况。所设计的活动也是层层递进，遵循英语学习活动观，注重以学生为中心，培养学生语言能力，教学目标基本可以实现。 不足：学生在提出建议时，虽然写出运用动词不定式，但内容上并没有特别丰富。 改进措施：通过收集学生所写内容，提取亮点句子进行分享。
