Lesson 53 hot snakes（课件）新概念英语第二册

Lesson 53 Hot Snake 触电的蛇 触电 get a electric shock ★hot adj. 热的； 新鲜的； 棘手的； 带电的, 充电的 at last 最后，终于 ★ fireman n. 消防队员 put out 扑灭，熄灭，关掉 请把火熄掉。 Please put the fire out ★ forest n.森林 消防队员们终于扑灭了加利福尼亚的一场森林大火。(时态发生在过去，强调对现在的影响） 1、At last firemen have put out a big forest fire in California. forest虽然是名词，但在句中起形容词的作用，修饰fire。 since then 从那时起，到现在为止 find out 表示经过研究、努力等“找出”、“查出”： I'll try and find out the name of the person who saved my life yesterday. 我将设法查出昨天救我命的那个人的姓名。 （这里find out的宾语是个从句） 从句，火怎样开始的 how the fire began. 从那时起，他们一直试图找出起火的原因。 2、Since then, they have been trying to find out how the fire began. ★ cause v.& n. 引起；原因 ① v. 引起 cause sth. 引起麻烦 Pride causes failure. 骄傲使人失败 cause sb. to do sth. 导致某人做某事 cause by sth 由某事引起 ② n. 原因，强调事情发生的直接原因(一个) broken glass 被打碎的玻璃片 cigarette ends 烟头 Throw to,Throw at ,Throw away throw “投,掷，抛，扔” throw away 扔掉，丢弃 Many people throw away cigarette ends carelessly. throw to (sb.) 扔给（某人） He threw the ball to me and I caught it. throw at 对准某一目标扔 The boy threw a stone at the window and broke it. 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 3、Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away. ★examine v. 检查 examine the ground 昨天，消防队员仔细查看了地面， 4、Yesterday the firemen examined the ground carefully ， 但未能发现碎玻璃。 5、but were not able to find any borken glass . be able to 能够 ； sure 有把握；确定 be sure that 对……很有把握； quite sure 相当的把握性 quite－>rather－>fairly （程度一个比一个轻） start a fire＝cause a fire （start vt. 使……发生，引起） 他们还十分肯定火灾也不是由烟头引起的。 6、They were also quite sure that a cigarette end did not start the fire. accidentally 偶然地 =by accident =by chance discover 本身含有偶然发现（某个已经存在的东西）的含义 我不知道谁发现美洲的。 I don’t know who discovered America. 然而今天上午，一个消防队员偶然发现了起火的原因。。 7、This morning, however, a firemen accidentally discovered