新概念英语第二册课件Lesson53（共50页）

这是一份新概念英语第二册课件Lesson53（共50页），共50页。PPT课件主要包含了单词学习，定语从句，现在完成进行时，与现在完成时的区别等内容，欢迎下载使用。
ht fireman cause examine accidentally remains windwire vlt pwer line slve 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
★ht adj 1）热的，炎热的Strike while the irn is ht. 趁热打铁.ht 炎热的 warm 温暖的 cl 凉爽的 chilly 寒冷的 cld 寒冷的,严寒的2）调味品辣的辣椒和芥末是辣的.Pepper and mustard are ht. 3）强烈的,激烈的,热烈的.have a ht temper 脾气暴躁a ht ptat 棘手或讨厌的事物或情况
★fireman=firefighter n 消防队员hydrant [`haidrənt] n.消防栓fire extinguisher 灭火器 Extinguish [ik`stiŋgwiʃ]＝put ut 灭火
★cause 1）V. 引起cause sth : 引起（麻烦）粗心导致事故Carelessness causes accidents. 骄傲使人失败Pride causes failurecause sb t d 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)reasn : 其他各种的理由(很多个)
be caused by…某事由…引起
★ 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 f the frest.2）v. 诊查医生仔细的诊察了病人。The dctr examined his patient carefully 3）v. 考试,测试examine students in Englishn. exam 考试=examinatin
★ accidentally adv. 意外地,偶然地adj. accidental 意外的,偶然的 意外死亡an accidental deathaccidentn. 事故,意外车祸a car accidentAccidentally=by chance=by accident我偶然间发现了金矿I fund a gld mine by accident / accidentally.
1. At last firemen have put ut a big frest fire in Califrnia. 消防队员们终于扑灭了加利福尼亚的一场森林大火。 at last（终于，到底）表示经过一番努力之后。put ut可以表示“扑灭”、“熄灭”、“关掉”Please put the light/ fire ut. 请把灯关掉／把火灭掉。Far water des nt put ut near fire. [谚]远水救不了近火。
2. Since then, they have been trying t find ut hw 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 ut （经过研究、努力等）找出，发现，查出……We shall find ut the truth early r late. 我们迟早会查明事实真相。G and find ut the truth t reprt back quickly. 立刻查明事实真相回来汇报。我会试着查出昨天救了我的人的名字。I’ll try and find ut the name f the persn wh saved my life yesterday.
3. Frest fires are ften caused by brken glass r by cigarette ends which peple carelessly thrw 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。 be caused by… 由…所引起His death was caused by a high fever. 他的死亡是由高烧引起的。The accident was caused by the drunk driver.事故是由酒后驾车的司机造成的。cigarette ends 烟头which 引导的是
4. Yesterday the firemen examined the grund carefully, but were nt able t find any brken glass. 昨天，消防队员仔细查看了地面，但未能发现碎玻璃。 be able t 能够 ；be nt able t 没有能够The dctrs were nt able t treat this disease.医生治不了这种病。I am srry, I am nt able t help yu. 对不起，我无法帮助您。I was nt able t get in tuch with yu yesterday.我昨天无法和你联络上。他现在没办法接你的电话。He is nt able t take yur call at the mment.我无法回答您的问题。I am nt able t help yu with yur questins.
5. They were als quite sure that a cigarette end did nt start the fire. 他们还十分肯定火灾也不是由烟头引起的。 be sure 确定Be sure t sweep the rm clean. 一定要把房间打扫干净。I am sure yu wuld get alng very well with him. 我相信你一定会跟他相处得很好。One thing is sure; he can't have gne far. 有一点是肯定的，他不可能走得很远。She is sure t pass the examinatin. 她一定会通过考试。start a fire＝cause a fire 引发火灾
6. This mrning, hwever, a fireman accidentally discvered the cause. 然而今天上午，一个消防队员偶然发现了起火的原因。 discver 发现（偶然发现某个已经存在的东西）They discver that the new teacher is very strict.他们发现新来的老师非常严格。He was surprised t discver that his best friend had turned traitr. 他惊讶地发现他最好的朋友竟成了叛徒。I d nt discver that until I g t pay.我去付钱的时候才发现。
★ remains1）n. 剩余物,残余物 残汤剩饭the remains f a meal2）n. (古建筑等物)遗址,废墟 圆明园遗址the remains f Yuanmingyuan3）n. 遗体,遗骸 毛主席的遗体被保存在水晶棺材里。The remains f Chairman Ma were kept well in a crystal cffin.
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, nthing remained in my huse. 要做的事还很多。Much remains t be dne. 木已成舟What’s dne is dne.2）v. 仍是,保持不变他保持沉默。He remained silent.
★ 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 t the bicycle with a piece f wire.telephne wires 电话线Electric wires 电线wireless adj. 无线的 wireless telegraphy 无线电报★vlt n. 伏特vltage n. 电压,伏特数
★ pwer1）电力，动力 electric pwer 电力water pwer 水力2）力,能力 （自然的体力、智力）His pwer is failing.他的体力在衰退。3）权力,支配力,势力 plitical pwer 政治权力nt within ne’s pwer= beynd ne’s pwer 力所不能及我无法理解计算机是如何工作的。It is beynd my pwer t understand hw the cmputer wrks.
slve v. 解决,解答,回答 =wrk ut解决问题slve a prblem解开谜团slve a mystery我们必须解决经济危机。We must slve the ecnmic crisis.n. slutin 解决,解答花费了很长时间才找出解决方法。It tk a lng time t find the slutin
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 mther was abut t see it.2）v. (趁机)迅速取得,急急忙忙吃完饭 他出其不意,吻了她一下。He snathed a kiss frm her.
snatch 迅速而有力(粗鲁地)抓住,抢 snatch a chancegrab 抓,抢,抢夺,抓住(热切而拼命地) grab sth frm sb/ grab sth frm sth grasp 1) 抓住或咬住,抓紧 grasp a chance 抓住机会 2)掌握 grasp a languagehld 抓住,握住,托住
构成：have/has been+ding含义：1）表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。
I have been writing a bk.我一直在写一本书。（动作还将继续下去） I have written a bk.我已经写了一本书。（动作已经完成
7. he nticed the remains f a snake which was wund rund the electric wires f a 16,.000-vlt pwer 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wund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arund／rund连用： Did yu wind this piece f wire rund the tree? 是你把这根铁丝缠在树上的吗？
8. In this way, he was able t slve the mystery. The explanatin was simple but very unusual. 就这样，他解开了起火之谜。解释很简单，却异乎寻常。 Slve v. 解决 slve the prblem 解决问题
9. A bird had snatched up the snake frm the grund and then drpped it n t 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） drp & fall a. drp 表示 “使落下、使掉落”，是及物动词, 带宾语： He drpped the bag. b. fall 表示 “掉下、跌倒”，是不及物动词，不能带宾语。 He fell dwn the stairs and brke his leg.
10. The snake then wund itself rund the wires. When it did s, it sent sparks dwn t the grund and these immediately started a fire. 于是蛇就缠住了几根电线。当它这样做时，把火花送到了地面，这些火花立刻引起了一场大火。 When it did s…当它这样做时…… s常用于一些动词之后，代指前面提过的某个动作／某件事，以免重复： Has Susan gt int University? I believe / think s.
本课所需掌握词组: put ut in this way since then slve the mystery find ut snatch up thrw away wind… rund
Cmprehensin questins1 Where was there a big frest fire? In Califrnia. 2 Have firemen put it ut? Yes, they have. 3 What have they been trying t find ut since then? Hw the fire began. 4 What are frest fires ften caused by? Brken glass r cigarette ends.
5 Peple are careless, aren't they? Yes, they are. 6 When did the firemen examine the grund? Yesterday. 7 Did they find any brken glass? N, they didn't. 8 Did they think a cigarette end started the fire? N, theydidn't.
9 They were quite sure it didn't, weren't they?(Yes, they were. )10 When was the cause discvered? (This mrning. )11 Wh discvered it? (A fireman did. )12 Was it what he was lking fr? (N, it wasn't. )
13 What did he ntice? The remains f a snake which was wund rund the electric wires f a 16, 000-vlt pwer line.
Asking questins：Ask me if⋯T： … there's been a big frest fire in Califrnia.S：Has there been a big frest fire in Califrnia?T：Where⋯?S：Where has been a big frest fire?
1 there's been a big frest fire in Califrnia. Where…2 firemen have put it ut. What / Wh…3 they've been trying t discver the cause. What / Wh…4 fires are ften caused by brken glass. What ⋯ by / Hw / What…5 they're als caused by cigarette ends. What else…
6 the firemen examined the grund yesteday. When /What/ Wh…7 they lked fr brken glass. What…8 a fireman discvered the cause accidentally. Hw / What / Wh…
Key t Summary writingNw that firemen have put ut a big frest fire in Califrnia,they have been trying t discver its cause. There was n evidencethat it was started by brken glass r a cigarette end. Hwever a fireman has just slved the mystery. He nticed the remains f a snake which had been drpped by a bird n t sme electric wires. In winding itself rund the wires, the snake had sent sparks t the grund and this caused the fire.
Key t KS ExercisesAWhat happened：began(1. 2); examined(1. 4);were nt able tfind(1. 5); did nt start(1. 6); discvered (1. 7); nticed(1.8);was wund(1. 8); was able t s lve(1. 9);drpped(1. 10); wund(1.11);it did s(1. 11); sent(1. 11);started (1. 11)What has happened：have put ut(1. 1)What has been happening：have been trying t find(1. 2)
CJack lked at his watch fr the twentieth time. Suddenly Jill arrived. ‘I've been waiting fr ver an hur, ’he said angrily. ‘Yu never cme n time. ’ ‘Oh, is that s?’Jill answered. ‘Were yu here at 2. 30?’ Jack went red. ‘Well, ’he said, ‘I gt here five minutes late myself, but yu weren't here. ’ ‘I came here at exactly 2. 30, ’Jill said, ‘and I waited fr five minutes, but yu didn't cme. ’‘What have yu been ding since then? ’Jack asked. ‘I've just been t the hairdresser's，’Jill answered brightly.
c 根据课文第二行… they have been trying t find ut hw the fire began 可以判断出只有c. wanted t find ut 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。
2. d 根据课文第10-12行A bird had snatched up the snake frm the grund and then drpped it n t the wires… When it I did s, it sent sparks dwn t the grund and these immediately started a fire 可以判断只有d. a snake which had been drpped n t 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。
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。
4. c 本句表示时间的词是ften, 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Brken glass 是单数，所以c.最符合语法，所以选c.
5. c a. almst certain(几乎肯定)， b. fairly certain(相当肯定)，c. cmpletely certain(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.
6. c 只有c. succeeded in slving it (成功解决了它)同前一句中的 was able t slve 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。
7. d 只有d. n是对的,因为它后面的词是the grund,表示在地面上,只能用介词n.其他3个选择都不符合题目意思.The snake had been n the grund.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。
8. c a. cntrlled it (控制了它)；b. checked it (制止了它); c. extinguished it (扑灭了它)；d. turned it ff (关掉，关上它)，只有c. extinguished it 与前面一句中的 put ut the fire (把火扑灭) 意义相同，所以选c.
9. d 只有d. this mrning 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.
10. a a. by chance (偶然)，b. chancily (没有这个词)；c. frtunately (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.
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. That's s 就是如此 b. like this 像这样 d. s 因此, 这3个选择都不符合题目意思. 只有c. That's hw(那就是的方法)同In this way 的含义相符合,因为hw 相当于the way in which ,所以选c.
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.