英语新概念2Lesson53-HotSnake教学课件

Vocabulary
snatch [snætʃ] v.抓住
【拓展】 catch v. 抓，如抓鱼 hold v. 握着 snatch v. (突然抓起来)强调动作的突然性 snatch up 一把抓住 seize v. 抓住(用力) seize my arm
Text
What caused the fire？
Vocabulary
solve [sɔlv] v.解决
【拓展】 solve the mystery solve the problem 【例句】 She tried her best to solve the problem. 她尽了最大的努力解决这个问题。
Vocabulary
mystery ['mistəri]
accidentally [ˌæksi'dentəli] ad.意外地,偶然
地
【拓展】 accident－>accidental－>accidentally accident n. 事故 unexpectedly adv. 出乎意料地(更趋向于 “意外” 的意思 ) 【例句】 I accidentally broke a glass. 我不小心把玻璃杯摔了。
从那时起，到现在为止
现在完成进行时
Since then, they have been trying to find out how the fire began.
从那时起，他们试图找出起火的原因。
find out 表示“查明,查出”,通常意味着经过一番努力<如经过询 问、研究、搜寻、调查）后才能发现。 e. g. They are trying to find out who committed the murder.
Vocabulary
cause [kɔ:z] v.引起 n.原因
【拓展】 n. 原因，强调事情发生的直接原因(一个) because 因为 reason 理由，其他各种的理由(很多个) cause of sth.指某事的原因 cause for sth.指做某事的理由 for后的宾语通常是表示行为或感觉的词
Vocabulary
fireman ['faiəmən] n.消防队员
【拓展】 hydrant n. 消防栓, 消防龙头 fire extinguisher 灭火器 （extinguisher n. 熄灭者, 灭火器） extinguish＝put out 灭火
Vocabulary
cause [kɔ:z] v.引起 n.原因
2. He actually has to walk on them. He can't do __c___.
a.else b.different c.otherwise
d.othຫໍສະໝຸດ Baidur
1.能在语境中正确运用本课的重点词汇; 2. 复习巩固语法：一般过去时
现在完成时 现在完成进行时
Vocabulary
Vocabulary
remains [ri'meinz] n.尸体，残骸
【拓展】 remains 指 dead body 【例句】 More human remains have been unearthed in the north. 更多人类遗骸在北方挖掘出土。
Vocabulary
wire ['waiə] n.电线
At last firemen have put out a big forest fire in California. Since then, they have been trying to find out how the fire began. Forest fire are often caused by broken glass or by cigarette ends which people car elessly throw away. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass. They were also quite sure that a cigarette end did not start the fire. This morning, however, a fireman accidentally discovered the cause. He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line. In this way, he was able to solve the mystery. The explanation was simple but very unusual. A bird had snatched up the snake from the ground and then dropped it on to the wires. The snake then wound itself round the wires. When it did so, it sent sparks down to the ground and these immediately started a fire.
volt [vəult] n.伏特(电压单位)
spark [spɑ:k] n.电火花
Vocabulary
power line 电力线
【拓展】 n.1. 能力，精力 2. 功率，动力,电力 3,幂,乘方4,权力,势力,政权 【词组】 come into power (开始)执政,当权;
have sb. in one's power控制住某人; power station发电站; power politics强权政治; power structure权力结构
Lesson 53 Hot snake
触电的蛇
Warm-up
单项选择。
1. You can sit here in your spare time. You can sit here when you're __d____.
a.working b.studying c.not working d.reading
最后
扑灭
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。
put out 既可表示“扑灭，熄灭”，也有“关掉”的含义，可以和 turn/switch off 替换。Please put the light out. fire 指“火焰”时不可数，但指“一堆火”或“一场火”是可数 I am afraid of fire.Sit around a fire.
Vocabulary
examine [ig'zæmin]
v.检查
【拓展】 examine the soil check v. 核实, 核对 【例句】 We should examine ourselves and learn who we are. 我们应该检查自己并学着认识我们是谁。
Vocabulary
n.谜
【拓展】 n.1.神秘，秘密 2.神秘的事物，不可思议的事物 【词组】 an air of mystery神秘的气氛;
make a mystery of把……搞得神秘; It's a mystery to me.这对我来说是个秘密。 【用法】 mystery novel/story/tale神秘小说,包括怪诞、侦 探、推理小说等。这时不能用 mysterious 来修饰。
由......引起的
香烟头
Forest fires are often caused by broken glass or by cigarette ends which people
carelessly throw away. 扔掉
New words and expressions
6 remains [ri'meinz] n.尸体，残骸 7 wire['waiə] n.电线 8 volt[vəult] n.伏特(电压单位) 9 power line电力线
New words and expressions
10 solve [sɔlv] v.解决 11 mystery ['mistəri] n.谜 12 snatch [snætʃ] v.抓住 13spark [spɑ:k] n.电火花
New words and expressions
1 hot [hɔt] a.带电的，充电的 2 fireman ['faiəmən] n.消防队员 3 cause [kɔ:z] v.引起 n.原因 4 examine [ig'zæmin] v.检查 5accidentally [ˌæksi'dentəli]ad.意外地,偶然地
Vocabulary
hot [hɔt] a.带电的，
充电的
【拓展】 hot adj. 辣的; 新鲜的；棘手的；带电的, 充电的 【应用】 hot-hot-hot 麻辣烫；hot-wings 辣鸡翅；hot dog 热狗 hot-tempered 火暴(脾气)的 （temper n. 脾气） hot line 热线；hot topic 热门话题 hot cake 热蛋糕 It sells like a hot cake/cakes. 表示一个东西的畅销, 热销
At last firemen have put out a big forest fire in California. Since then, they have been trying to find out how the fire began. Forest fire are often caused by broken glass or by cigarette ends which people car elessly throw away. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass. They were also quite sure that a cigarette end did not start the fire. This morning, however, a fireman accidentally discovered the cause. He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line. In this way, he was able to solve the mystery. The explanation was simple but very unusual. A bird had snatched up the snake from the ground and then dropped it on to the wires. The snake then wound itself round the wires. When it did so, it sent sparks down to the ground and these immediately started a fire.
【拓展】 v. 引起 cause sth. 引起麻烦 Carelessness causes accidents. 粗心导致事故 Pride causes failure. 骄傲使人失败 cause sb. to do sth. 引起某人做某事, 导致某人做某事 Illness caused him to lose his temper. (lose one’s temper 发火)