Lesson 53 A hot snake课文详解+重点词汇语法学案-2022-2023学年新概念第二册

Lesson 53 文本  Hot snake 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 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 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. 文本解析 一）词汇学习Word study 1. throw throw作及物动词主要含义为“投”、“掷”、“抛”、“扔”。当它与不同的介词或副词连用时，其意义会稍有变化。throw away表示“扔掉”、“丢弃”；throw at表示对准某一目标扔；throw to则表示扔给（某人）： Many people throw away cigarette ends carelessly.许多人随手乱扔香烟头。Shall I throw this old newspaper away?我把这旧报纸扔掉好吗？Don't throw stones at the dog/ the window.别对着狗／窗子扔石头。I threw the ball to John but Tom caught it.我把球扔给约翰，但汤姆接住了球。 2. cause与reason（1）cause作名词时最重要的含义是“原因”、“起因”：A fireman accidentally discovered the cause of the fire.一个消防队员偶然发现了起火的原因。Do you know the cause of the war?你知道这场战争的起因吗？（cause通常与of连用）cause作动词时可以表示“使……产生／发生”、“引起”：Forest fires are often caused by broken glass or cigarette ends.森林火灾时常由碎玻璃或香烟头引起。What caused the accident?事故是如何造成的？ （2）reason作名词时最重要的含义是“理由”、“原因”：Give me your reasons for going there.请告诉我你去那里的理由。What was the reason for the delay?延迟的原因是什么？ 作“原因”讲时，reason与cause可以互相交换使用，但reason与介词for连用，而cause则与介词of连用： What was the cause of the delay?（译文同上） reason后面通常跟why引导的从句： That was the reason why the meeting was put off.这就是会议推迟的原因。reason作动词时表示“推理”、“劝导”、“说服”等：How can you reason with him when he is so worried?他现在如此担心，你怎么能劝得了他？ 3. dro