新概念第二册lesson53课件.pptx

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1、单词学习hot fireman cause examine accidentally remains windwire volt power line solve mystery snatch spark adj.带电的，通电的n.消防队员v.引起；n.原因v.检查adv.意外地，偶然地n.尸体，残骸v.缠绕n.电线n.伏特（电压单位）电力线v.解决n.谜v.抓住n.电火花第1页/共42页hot adj 1）热的，炎热的Strike while the iron is hot.趁热打铁.hot 炎热的 warm 温暖的 cool 凉爽的 chilly 寒冷的 cold 寒冷的,严寒的2）调味品

2、辣的Pepper and mustard are hot.辣椒和芥末是辣的.hot-hot-hot 麻辣烫；hot-wings 辣鸡翅；3）强烈的,激烈的,热烈的.have a hot temper 脾气暴躁a hot potato 棘手或讨厌的事物或情况hot news 最热点的新闻第2页/共42页fireman n 消防队员hydrant haidrnt n.消防栓fire extinguisher 灭火器 Extinguish ikstigwiput out 灭火第3页/共42页cause 1）V.引起cause sth:引起（麻烦）粗心导致事故Carelessness causes a

3、ccidents.骄傲使人失败Pride causes failurecause sb to do sth 引起某人做某事,导致某人做某事2）n.原因 cause:强调事情发生的直接原因(一个)reason:其他各种的理由(很多个)The cause of sth 的起因The reason for sth 的理由第4页/共42页 examine1）v.仔细观察,检查,调查消防队员检查了森林的每一寸土地。The firefighters examined every inch of the forest.2）v.诊查医生仔细的诊察了病人。The doctor examined his pati

4、ent carefully 3）v.考试,测试examine students in Englishn.exam 考试=examination第5页/共42页 accidentally adv.意外地,偶然地 accidentaccidentalaccidentallyadj.accidental 意外的,偶然的 反义词 intentional故意的，策划的意外死亡an accidental deathaccidentn.事故,意外a car accident车祸 Accidentally=by chance=by accident我偶然间发现了金矿I found a gold mine by

5、 accident.第6页/共42页7 remains1）n.剩余物,残余物 残汤剩饭the remains of a meal2）n.(古建筑等物)遗址,废墟 圆明园遗址the remains of Yuanmingyuan3）n.遗体,遗骸 毛主席的遗体被保存在水晶棺材里。The remains of Chairman Mao were kept well in a crystal coffin.第7页/共42页remain1）v.留下,剩下,遗留大火之后，我的房子里什么也没剩下。After the fire,nothing remained in my house.要做的事还很多。Muc

6、h remains to be done.木已成舟Whats done is done.2）v.仍是,保持不变他保持沉默。He remained silent.第8页/共42页 wiren.金属线，电线 他用一根金属线把筐绑到了自行车上。He tied a basket to the bicycle with a piece of wire.telephone wires 电话线Electric wires 电线wireless adj.无线的 wireless telegraphy 无线电报volt n.伏特voltage n.电压,伏特数第9页/共42页 power1）电力，动力 elec

7、tric power 电力water power 水力2）力,能力（自然的体力、智力）His power is failing.他的体力在衰退。3）权力,支配力,势力 political power 政治权力not within ones power=beyond ones power 力所不能及我无法理解计算机是如何工作的。It is beyond my power to understand how the computer works.第10页/共42页solve v.解决,解答,回答=work outsolve a problem解决问题solve a mystery解开谜团We mu

8、st solve the economic crisis.我们必须解决经济危机n.solution 解决,解答花费了很长时间才找出解决方法。It took a long time to find the solution第11页/共42页snatch1）v.抢,夺,掠取 snatch up 抓起来贼把她的包抓起来逃跑了。The thief snatched her bag and ran away.在他妈妈刚要看那张纸的时候，他把它夺走了。He snatched the paper as his mother was about to see it.2）v.(趁机)迅速取得,急急忙忙吃完饭 他

9、出其不意,吻了她一下。He snathed a kiss from her.第12页/共42页辨析snatch 迅速而有力(粗鲁地)抓住,抢(突然抓起来)强调动作的突然性 snatch a chancegrab 抓,抢,抢夺,抓住(热切而拼命地)grab sth from sb/grab sth from sth grasp 1)抓住或咬住,抓紧 grasp a chance 抓住机会 2)掌握 grasp a languagehold 抓住,握住,托住 seize v.抓住(用力)seize my arm第13页/共42页现在完成进行时构成：have/has been+doing含义：1）表

10、示从过去某时开始一直持续到现在的动作，并且还将持续下去。2）表示在说话时刻之前到现在正在进行的动作。与现在完成时的区别I have been writing a book.我一直在写一本书。（动作还将继续下去）I have written a book.我已经写了一本书。（动作已经完成)第14页/共42页【Key structures】一般过去时、现在完成时与现在完成进行时一般过去时通常与一个表示确切的时间的状语连用，现在完成时则有时与表示一段时间的状语(since,for)连用，有时不需要时间状语，而现在完成进行时则有时与表示一段时间的状语连用，有时与all+表示时间的名词连用。现在完成时与

11、一般过去时中既可以用状态动词（表示存在、拥有、感情、思想、需求等的动词）也可以用行为动词，现在完成进行时则通常与行为动词连用。第15页/共42页现在完成进行时与现在完成时的区别(1)现在完成时强调动作的完成，而现在完成进行时强调动作的延续，因此，表示动作的完成，只能用现在完成时，而不能用现在完成进行时。如：He has changed his idea.他改变了想法。(2)在表示动作的延续时，虽然既可用现在完成时，也可用现在完成进行时，但现在完成进行时强调动作的进行。因此在需要明确表示动作还要持续下去时，应用现在完成进行时。如：We have been studying here for tw

12、o years.我们在这儿已经学习了两年了。(3)有些延续性动词(如 keep,learn,live,stay,study,work等)，用于现在完成时或现在完成进行时的区别不大。如：I have lived here for many years.=I have been living here for many years.我在这儿住了多年了。第16页/共42页-Why are you so tired?I_(paint)my house,and it will be finished till next weekI_(cough)for two days,and I will see t

13、he doctor this afternoon.He _ _(finish)his work for two days跟次数连用的,一定只能用完成时,不能用现在完成进行时He has rung me up five times since 12 oclock.have been painting have been coughing has finished第17页/共42页1.At last firemen have put out a big forest fire in California.消防队员们终于扑灭了加利福尼亚的一场森林大火。（1）at last（终于，到底）表示经过一番努

14、力之后。（2）put out可以表示“扑灭”、“熄灭”、“关掉”等含义：Please put the light/fire out.请把灯关掉把火灭掉。2.Since then,they have been trying to find out how the fire began.从那时起，他们一直试图找出起火的原因。since then 从那时起，到现在为止 find out（经过研究、努力等）找出，发现，查出我会试着查出昨天救了我的的名字。Ill try and find out the name of the person who saved my life yesterday.第18

15、页/共42页3.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.森林火灾时常由破碎的玻璃或人们随手扔掉的香烟头引起。cigarette ends 烟头Throw away 扔掉，丢弃Throw about 随处扔Throw at 扔向（有目标性）Throw to 扔向（无目标性第19页/共42页3.Forest fires are often caused by broken glass or by cigarette ends which

16、 people carelessly throw away.森林火灾时常由破碎的玻璃或人们随手扔掉的香烟头引起。cigarette ends 烟头Throw away 扔掉，丢弃Throw about 随处扔Throw at 扔向（有目标性）Throw to 扔向（无目标性第20页/共42页4.Yesterday the firemen examined the ground carefully,but were not able to find any broken glass.examine v.检查，名词形式是examination,通常简写成exam,表示考试。be able to 能

17、够；be not able to 没有能够第21页/共42页5.They were also quite sure that a cigarette end did not start the fire.他们还十分肯定火灾也不是由烟头引起的。quite sure 相当的把握性start a firecause a fire start vt.使发生，引起be sure that 对很有把握；quite sure 相当的把握性rather adv.相当fairly adv.相当,公正地,诚实地quite(completely)ratherfairly 程度一个比一个轻quite a few 颇有

18、几个(相当多的)第22页/共42页6.This morning,however,a fireman accidentally discovered the cause.然而今天上午，一个消防队员偶然发现了起火的原因。Accidentally 表示事情出乎意料地发生，即“意外地、偶然地”discover含有偶然发现（某个已经存在的东西）的意思，在discover前面加上accidentally更加强了“偶然性”和“意外性”。第23页/共42页7.he noticed the remains of a snake which was wound round the electric wires o

19、f a 16,.000-volt power line.他发现了缠绕在16，000伏高压线上的一条死蛇。the remains表示“尸体”、“残骸”，必须用复数形式wound为wind的过去分词。wind在这里不表示“蜿蜒”，而表示“卷在上”、“缠绕”，常与aroundround连用：Did you wind this piece of wire round the tree?是你把这根铁丝缠在树上的吗？第24页/共42页8.In this way,he was able to solve the mystery.The explanation was simple but very unus

20、ual.就这样，他解开了起火之谜。解释很简单，却异乎寻常。solve v.解决 e.g.solve the problem 解决问题 第25页/共42页9.A bird had snatched up the snake from the ground and then dropped it on to the wires.一只鸟把蛇从地上抓起来，然后把它扔到了电线上。于是蛇就缠住了几根电线。snatch v.抓 The man snatched her purse and ran.那人抓起她的钱包就跑。（强调动作很快很猛）drop&fall a.drop 表示“使落下、使掉落”，是及物动词,

21、带宾语：He dropped the bag.b.fall 表示“掉下、跌倒”，是不及物动词，不能带宾语。He fell down the stairs and broke his leg.第26页/共42页本课所需掌握词组:put out in this way since then solve the mystery find out snatch up throw away wind round 第27页/共42页CJack looked at his watch for the twentieth time.Suddenly Jill arrived.Ive been waiting

22、for over an hour,he said angrily.You never come on time.Oh,is that so?Jill answered.Were you here at 2.30?Jack went red.Well,he said,I got here five minutes late myself,but you werent here.I came here at exactly 2.30,Jill said,and I waited for five minutes,but you didnt come.What have you been doing

23、 since then?Jack asked.Ive just been to the hairdressers，Jill answered brightly.第28页/共42页1.c 根据课文第二行 they have been trying to find out how the fire began 可以判断出只有c.wanted to find out what had caused the fire 最能说明消防队员仔细查看地面的原因，其他3个选择都不够全面。第29页/共42页2.d 根据课文第10-12行A bird had snatched up the snake from t

24、he ground and then dropped it on to the wires When it I did so,it sent sparks down to the ground and these immediately started a fire 可以判断只有d.a snake which had been dropped on to the wires by a bird 与课文的实际内容相符，只有它是引起火灾的原因，其他3个选择都不符合课文的实际内容。第30页/共42页3.a 只有a.since最合乎题目意思和语法。因为本句是现在完成进行时，只有since引导的时间短语

25、最适合于完成进行时态，表示“自从以来”，所以应该选a.其他3个选择都不能引导合适的时间短语。第31页/共42页4.c 本句表示时间的词是often,表示经常性的动作，因此应该用一般现在时。a.is causing 是进行时，b.has caused 是完成时，d.is caused by 是现在时被动语态，而本句需要主动语态。只有c.causes 是一般现在时，第3人称单数形式，本句的主语Broken glass 是单数，所以c.最符合语法，所以选c.第32页/共42页5.c a.almost certain(几乎肯定)，b.fairly certain(相当肯定)，pletely certa

26、in(完全肯定)，d.nearly certain(几乎肯定)4个选择中只有c.同前一句中的quite sure(十分确信)意义最接近，所以选c.第33页/共42页6.c 只有c.succeeded in solving it(成功解决了它)同前一句中的 was able to solve the mystery(解开了这个谜)的含义相同，所以c.是正确答案。其他3个选择都与前一句意思不符。第34页/共42页7.d 只有d.on是对的,因为它后面的词是the ground,表示在地面上,只能用介词on.其他3个选择都不符合题目意思.The snake had been on the groun

27、d.这条蛇在地面上。注意本句说的是在蛇被抓起之前，它在哪？它在地面上。第35页/共42页8.c a.controlled it(控制了它)；b.checked it(制止了它);c.extinguished it(扑灭了它)；d.turned it off(关掉，关上它)，只有c.extinguished it 与前面一句中的 put out the fire(把火扑灭)意义相同，所以选c.第36页/共42页9.d 只有d.this morning 今天早上,是正确的表达方式.其它3个选择都不符合习惯用法,都不是正确的表达方式.所以选d.第37页/共42页10.a a.by chance(偶然

28、)，b.chancily(没有这个词)；c.fortunately(幸运地)和d.luckily(侥幸地，幸运地)这4个选择中只有a.by chance 同前一句中的accidentally(偶然地)意义相同，所以选a.第38页/共42页11.c 前一句的短语In this way 是用这种方法,本句需要选一个同这一短语含义相符合的短语.a.Thats so 就是如此 b.like this 像这样 d.so 因此,这3个选择都不符合题目意思.只有c.Thats how(那就是.的方法)同In this way 的含义相符合,因为how 相当于the way in which,所以选c.第39页/共42页12.c a.taken(拿),b.pulled(拉,拖),c.seized(抓住)和d.carried(携带)4个选择中只有c.seized同前一句的snatched(抓住)意义相同,所以选c.第40页/共42页第41页/共42页2023/2/12感谢您的观看。第42页/共42页