Teaching aims
通过本单元的教学，学生了解有关急救的常识，在生活中如何处理一些突发事件，然后实施紧急救护等总结，归纳情态动词的用法，如：should/shouldn’t; must/mustn’t ;ought to等表示义务和责任的用法。
Teaching important and difficult points
1.Words
knee, still, bite (bit, bitten/bit), lay (laid, laid), mouth-to-mouth, bum, cut, electric, container pool, breathe, within, handkerchief, wound, safety, wire, guard, sideway, firm, firmly wherever, stomach, injure, injured, injury, poison, quantity, nearby
2.Phrases
first aid, ought to, medical care, by mistake, pay attention to, in a short while, deal with, take it easy, running water, out of one’s reach, throw up, hold up
3. Useful expressions
We must carry her to the side of the road.
You mustn’t move someone if they are badly hurt.
Parents should know some first aid.
You shouldn’t get up if you are badly hurt.
I ought to go home.
I have to cook supper for my grandmother.
4. Grammar
Revise Modal Verbs : must, should
Study Modal Verb: ought to
教学建议
课文建议
教师安排中国学习联盟声朗读课文，理解课文含义，通过阅读，教师对学生可小组讨论，提问，口语练习，复述急救方法等，教师给学生展示几组图片，帮助学生学会一般的急救措施和家庭安全常识。
写作建议
教师布置学生写作的题目及要求，教师给学生几分钟时间进行讨论，教师给学生一些关键的词语，如：breathe, First Aid Centre, handkerchief, mouth-to mouth so on.之后，教师给学生十分钟左右时间开始写，最后教师请几位同学朗读，教师给予讲评。
教材分析
本单元是围绕First aid, Safety in the home,展开话题。对话课中描述两个学生在街上看到一个女孩从自行车上摔下来的经过，同时对话中使用了情态动词的用法，课文中附有图片和口语练习，帮助学生了解急救的重要性及有关的常识。
重点难点：
1. What should you do if a person has drunk poison by mistake? 假如有人误喝了毒药，你怎么办？
by mistake是固定词组，意为“错误地”，“无心地（做错了事）”。例如：
She put salt in her cup of coffee by mistake．她错将盐放入咖啡里了。
2. do with，deal with
二者都可以用来表示“处理”的意思
但是用于特殊疑问句的时候do with与what连用；deal with则与how连用。例如：
你会怎样处理一个从自行车上摔倒而严重受伤的？
另外，do with还可表达别的意思。例如：
What did you do with my umbrella? (=Where did you put my umbrella?)
你把我的伞放到哪里去了？
What are we to do with this naughty boy? (=How are we to deal with this naughty boy?) 我们该怎样处置这个顽皮的男孩？
3. knock at, knock down & knock into的区别
knock at 指“敲打门窗”
I heard someone knocking at the door.我听见有人敲门。
Tom tried knocking at the window.汤姆试着敲了敲窗户。
knock down 指“……撞倒”
He nearly knocked me down at the corner.在拐角处，他几乎把我撞倒。
He was knocked down by a car. 他被汽车撞倒了。
knock into 指“碰倒，撞上某人”，也可指“偶然碰见”。
The child knocked into the teacher.那孩子撞到了老师身上。
He knocked into the chair in the dark.黑暗中他撞在了椅子上。
He didnt expect to knock into some of his friends here.他没有想到在这儿遇见一些朋友。
4. ask, demand, inquire, question & require
1)ask是一个常用词，表示“问”的意思。
Did you ask the price of that ten－speed bicycle?你打听过那辆十速自行车的价钱了吗？
2)demand含有强硬、断然的意味。
I demand that you leave this place at once.我要求你立即离开此地。
3)inquire 多用于较正式的语体，通常只表示打听消息，寻求答案。
He inquired of the girl the way to the railway station.他问那女孩到火车站怎么走。
4)question 常表示一连串问题，有时则有盘问，审问之意。
①The questioning of the prisoner went on for hours.对那个囚犯的审讯延续了好几个小时。
5)require有按照权利来“要求”或“命令”之意。
Since he was involved in the case, the court required his appearance.由于他与此案有关，法庭令他出庭。
5.breathe & breath
1)breathe 是动词，是“呼吸”的意思。
He was breathing hard/heavily after racing for the train.他跑着赶上了火车，吃力地喘着气。
It is good to breathe fresh country air instead of city smoke.呼吸乡间新闻空气而不吸入城市烟尘是有益的。
▲注意以下几个习语的意思：
1）I cant concentrate with you breathing down my neck.你这样紧紧叮着我，使我精神无法集中。
2）Promise me you wont breathe a word of this to anyone.答应我别将此事泄漏给任何人。
3）The new manager has breathed fresh life into the company.新经理给公司带来了朝气。
2)breath是名词，也作“呼吸”解。
1）You can see peoples breath on a cold day.冷天能看到人们呼出的空气。
2）His breath smelt of garlic.他呼出气中有蒜味。
▲注意以下习语的意思：
①Her smile is a breath of fresh air in this gloomy office.她的微笑给沉闷的办公室带来生气。
