4.Burns are called first,second or third degree burns,depending on which layers of the skin are burned.根据皮肤烧伤的程度，有
考点提炼 depending on which layers of the skin are burned为现在分词短语作 伴随 状语。 相当于 which 引导的非限制性定语从句。现在分 词短语在句中可作时间状语、原因状语、方式状 语、结果状语、伴随状语，其逻辑主语与主句的 主语保持一致，并且与主句的主语存在着主谓关 系，逻辑主语与系动词均可省略。
2.present
John was presented with his award at a ceremony... (回归课本P38) 观察思考 We don’t have any more information at the present time. There were 200 people present at the meeting. 有200 You neis a warm-hearted man,and he always aids me in career. 他是一个热心肠的人，总是在事业上帮助我。
归纳总结 aid n. & vt. (1)by/with the aid of sb.(=with sb.’s aid)在
in aid of a hearing aid go/come to sb.’s aid去/ do/give/offer/perform/carry out first aid进行
Ⅱ.重点短语再现
1.in place 2. dress up 3. make no difference 4.squeeze out 5. over and over again 6. a number of 7. first aid 8. fall ill 9.run away 10.be present (at)
(2)help为最普通用语，指以积极的态度给予各方面 的帮助，强调受助者得到帮助或好处，并着重受助
(3)assistance指协助，正式用语，多指在提供的帮 助中所起的次要或协助作用。
即学即用—— (1)We are collecting money in aid of the
people who have lost their homes in the earthquake. (2)They encouraged and aided him in his scientific studies. (3)They aided the poor village with money.
call in one’s aid (2)aid sb.in sth./doing sth.在某方面帮助某人 aid sb.with sth.以…… aid sb.to do sth.
易混辨异 aid,help,assistance 这三个词都有“帮助；援助”的意思，但用法不同。 (1)aid强调援助处于困难或危险境地的人，有时意
The local MP will start the race and present the prizes. 当地议员将鸣枪开赛，并颁发奖品。
归纳总结 present adj.出席的；目前的 ；n.目前；礼物， 赠品；vt. at present for the present present sb.with sth.向某人显示某物；将某物赠
导练互动
重点单词 1.aid
First aid for burns（回归课本P33 观察思考 We’re collecting money in aid of cancer research.
Finding her so anxious,I decided to aid her to continue the study/to aid her in continuing the study.
Ⅲ.典型句式运用
1.So as you can imagine,if your skin gets burned it can be very serious.因此你可以想
考点提炼 （1）can be serious意为“ 有时候会 很严重 ”。在can be+adj.结构中can意为 “有时候会……，可能会……”。 （2）get常与marry,beat,break,damage,tear, strike,hurt,paint,invite,repair,dress等动词 的 过去 分词连用，构成 被动 语态。get加过去分 词表示的被动语态一般指动作的结果而非动作本 身，常指“最后终于，突然发生”等意义。
3.John was studying in his room when he heard screaming.约翰正在房间里学习，突然听到一声
考点提炼 when在此句中意为“这时，突然”， 相当于at this/that time，常用于以下结构中： be doing...when...正在……这时…… be about to do...when...正打算做……这 时…… be just going to do...when...正要……这 时…… had just done...when...刚做了……这时…… be on the point of doing...when...正要…… 这时……
2.He slowed the bleeding by applying pressure to the wounds until the police and ambulance arrived.他使劲按住伤口，使血流得
考点提炼 by doing...意为“ 通过做…… ”， 此短语一般作 方式状语 ，说明方式、手段等。