新概念第一册-Lesson 53

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新概念第一册-Lesson 53
第一部分 WORDS AND EXPRESSIONS

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第二部分 TEXT
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 fires are often caused by broken glass or by cigarette ends which people carelessly 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 firemen 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.
[U]参考译文[/U]
消防队员们终于扑灭了加利福尼亚的一场森林大火. 从那时起, 他们一直试图找出起火的原因. 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. 昨天, 消防队员仔细查看了地面, 但未能发现碎玻璃. 他们还十分肯定火灾也不是由烟头引起的. 然而今天上午,一个消防队员偶然发现了起火的原因. 他发现了缠绕在16, 000伏高压线上的一条死蛇. 就这样, 他解开了起火之谜. 解释很简单, 却异乎寻常. 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. 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.
第三部分 LANGUAGE POINTS
1.Hot snake
hot:charged with electricity
2.Since then, they have been trying to find out how the fire began.
since then:since引导的时间状语，主句常用完成时态
find out:查明
how the fire began：注意宾语从句中的词序
3.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.
fires:泛指很多火灾
broken glass:不可数名词
a glass:一个玻璃杯
glasses：眼镜
4.They were also quite sure that a cigarette end did not start the fire.
quite(＝completely)－>rather－>fairly:程度一个比一个轻
start:引发
5.He noticed the remains of a snake which was wound round the electric wires of a 16, 000-volt power line.
remains:dead body
which was wound round the electric wires of a 16, 000-volt power line:定语从句修饰snake
6.A bird had snatched up the snake from the ground and then dropped it on to the wires.
=A bird had snatched up the snake from the ground and had then dropped it on to the wires
snatch up:迅速抓取
on to=onto
7.When it did so, it sent sparks down to the ground and these immediately started a fire.
so是代词，指代winding itself round the wires
these指代sparks
第四部分 KEY STRUCTURES AND USAGE
时态的复习
=>At last firemen have put out a big forest fire in California.
用现在完成时体现动作的完成对现在的影响
=>Since then, they have been trying to find out how the fire began.
动作已经延续到目前
=>Forest fires are often caused by broken glass or by cigarette ends
一般现在时，表达一般看法
=>Yesterday the firemen examined the ground carefully, but were not able to find any broken glass.
叙述过去发生的动作，带有时间状语
=>A bird had snatched up the snake from the ground and then dropped it on to the wires.
过去完成时表示动作发生在叙述中的时间（过去）之前
如需要了解其他更多语法点，请查阅HJ英语语法大全在线词典 （点击进入）




Exercises
一、中译英
1、高压电线
2、大雨引发了洪水
3、是什么导致了他的失败？
4、请来一杯水
5、你认识那边戴着眼睛的人么？
6、烟呛得他咳嗽起来
7、这条蛇于是缠住了电线
8、白云在山间缭绕
9、她用绷带裹住她受伤的腿
二、谚语"水火无情"用英语怎么表达？
点击查看答案
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