Lesson53 Hot snake
新概念英語2課文內(nèi)容：
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..
本文語法：現(xiàn)在完成進(jìn)行時
一句話總結(jié)：現(xiàn)在完成進(jìn)行時表示過去某時開始發(fā)生，一直延續(xù)到現(xiàn)在并且可能繼續(xù) 發(fā)生下去的動作?，F(xiàn)在完成進(jìn)行時即現(xiàn)在完成時和進(jìn)行時的復(fù)合時態(tài)（has/havebeen + doing)。
How long have you been walking?你走了多長時間？
He has been thinking of how to succeed.他一直在想如何獲得成功。
新概念英語2逐句精講:
1、At last firemen have put out a big forest fire in California.
消防隊(duì)員們終于撲滅了加利福尼亞的一場森林大火。
語言點(diǎn) put out = extinguish 撲滅
2、Since then, they have been trying to find out how the fire began.
從那時起，他們一直試圖找出起火的原因。
語言點(diǎn) 辨析：begin, start
begin強(qiáng)調(diào)從零開始，反義詞是end。
start常常是指中斷后又開始，反義詞是stop。
3、Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.
森林火災(zāi)時常由破碎的玻璃渣子或人們隨手扔掉的煙頭引起。
語言點(diǎn)1 本句中which引導(dǎo)定語從句。
語言點(diǎn)2 broken過去分詞作定語，修飾glass。因?yàn)樗椴ＡЭ梢砸鸸獾恼凵鋸亩鴮?dǎo)致火災(zāi)的發(fā)生。
4、Yesterday the firemen examined the ground carefully, but were not able to find any broken glass.
昨天，消防隊(duì)員仔細(xì)檢查了地面，但沒有發(fā)現(xiàn)任何碎玻璃。
語言點(diǎn) were not able to find表示“沒有發(fā)現(xiàn)”。
5、They were also quite sure that a cigarette end did not start the fire.
他們還十分肯定火災(zāi)也不是由煙頭引起的。
語言點(diǎn) sure的三種用法：1) sb. be sure of某人確信;2) sb. be sure to do某人相信能夠去做某事;3 ) sb. be sure that某人確信
6、This morning, however，a fireman accidentally discovered the cause.
然而今天上午，一個消防隊(duì)覓偶然發(fā)現(xiàn)了起火的原因。
語言點(diǎn) 辨析：三個常見的表示“發(fā)現(xiàn)”的詞：1) find偶然發(fā)現(xiàn)，碰到;2) find out查明小悄的真相;3) discover找到鮮為人知的事物。
7、He noticed the remains of a snake which was wound round the electric wires of a 16,000 - vcrfl power fine.
他發(fā)現(xiàn)了纏繞在16000伏高壓線上的一條死蛇。
語言點(diǎn)1 本句中which引導(dǎo)定語從句。
語言點(diǎn)2 the remains在表示“殘骸”時必須使用復(fù)數(shù)形式。
語言點(diǎn)3 wound是wind的過去分詞，在此不表示“蜿蜒”，而表示“卷在……上，纏繞”，常常與 round / around 搭配使用。
8、In this way, he was able to solve the mystery.
就這樣，他解開了起火之謎。
語言點(diǎn) was able to solve the mystery = could solve the mystery
9、The explanation was simple but very unusual.
解釋簡單，卻異乎尋常。
語言點(diǎn) 這是一個省略句，補(bǔ)充完整為：The explanation was simple but was very unusual.
10、A bird had snatched up the snake from the ground and then dropped it on to the wires.
一只鳥把蛇從地上抓起來，然后把它扔到了電線上?！?BR> 語言點(diǎn) 辨析drop, fell:
1) drop v.丟在，降落(主動);drop n.水珠;[復(fù)]眼藥水，滴劑
2) fell v.掉下，墜落(被動);falln.秋天;瀑布(=waterfall)
11、The snake then wound itself round the wires.
于是蛇就纏住了幾根電線。
語言點(diǎn) then意為“然后”
12、When it did so, it sent sparks down lo the ground and these immediately started a fire.
當(dāng)它這樣做時，把大花送到了地面，這法火花立刻引起了一場大火
語言點(diǎn) so常常用在動詞后表示前句說過的一件事情或者某個動作，避免重復(fù)。
新概念英語2課文內(nèi)容：
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..
本文語法：現(xiàn)在完成進(jìn)行時
一句話總結(jié)：現(xiàn)在完成進(jìn)行時表示過去某時開始發(fā)生，一直延續(xù)到現(xiàn)在并且可能繼續(xù) 發(fā)生下去的動作?，F(xiàn)在完成進(jìn)行時即現(xiàn)在完成時和進(jìn)行時的復(fù)合時態(tài)（has/havebeen + doing)。
How long have you been walking?你走了多長時間？
He has been thinking of how to succeed.他一直在想如何獲得成功。
新概念英語2逐句精講:
1、At last firemen have put out a big forest fire in California.
消防隊(duì)員們終于撲滅了加利福尼亞的一場森林大火。
語言點(diǎn) put out = extinguish 撲滅
2、Since then, they have been trying to find out how the fire began.
從那時起，他們一直試圖找出起火的原因。
語言點(diǎn) 辨析：begin, start
begin強(qiáng)調(diào)從零開始，反義詞是end。
start常常是指中斷后又開始，反義詞是stop。
3、Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.
森林火災(zāi)時常由破碎的玻璃渣子或人們隨手扔掉的煙頭引起。
語言點(diǎn)1 本句中which引導(dǎo)定語從句。
語言點(diǎn)2 broken過去分詞作定語，修飾glass。因?yàn)樗椴ＡЭ梢砸鸸獾恼凵鋸亩鴮?dǎo)致火災(zāi)的發(fā)生。
4、Yesterday the firemen examined the ground carefully, but were not able to find any broken glass.
昨天，消防隊(duì)員仔細(xì)檢查了地面，但沒有發(fā)現(xiàn)任何碎玻璃。
語言點(diǎn) were not able to find表示“沒有發(fā)現(xiàn)”。
5、They were also quite sure that a cigarette end did not start the fire.
他們還十分肯定火災(zāi)也不是由煙頭引起的。
語言點(diǎn) sure的三種用法：1) sb. be sure of某人確信;2) sb. be sure to do某人相信能夠去做某事;3 ) sb. be sure that某人確信
6、This morning, however，a fireman accidentally discovered the cause.
然而今天上午，一個消防隊(duì)覓偶然發(fā)現(xiàn)了起火的原因。
語言點(diǎn) 辨析：三個常見的表示“發(fā)現(xiàn)”的詞：1) find偶然發(fā)現(xiàn)，碰到;2) find out查明小悄的真相;3) discover找到鮮為人知的事物。
7、He noticed the remains of a snake which was wound round the electric wires of a 16,000 - vcrfl power fine.
他發(fā)現(xiàn)了纏繞在16000伏高壓線上的一條死蛇。
語言點(diǎn)1 本句中which引導(dǎo)定語從句。
語言點(diǎn)2 the remains在表示“殘骸”時必須使用復(fù)數(shù)形式。
語言點(diǎn)3 wound是wind的過去分詞，在此不表示“蜿蜒”，而表示“卷在……上，纏繞”，常常與 round / around 搭配使用。
8、In this way, he was able to solve the mystery.
就這樣，他解開了起火之謎。
語言點(diǎn) was able to solve the mystery = could solve the mystery
9、The explanation was simple but very unusual.
解釋簡單，卻異乎尋常。
語言點(diǎn) 這是一個省略句，補(bǔ)充完整為：The explanation was simple but was very unusual.
10、A bird had snatched up the snake from the ground and then dropped it on to the wires.
一只鳥把蛇從地上抓起來，然后把它扔到了電線上?！?BR> 語言點(diǎn) 辨析drop, fell:
1) drop v.丟在，降落(主動);drop n.水珠;[復(fù)]眼藥水，滴劑
2) fell v.掉下，墜落(被動);falln.秋天;瀑布(=waterfall)
11、The snake then wound itself round the wires.
于是蛇就纏住了幾根電線。
語言點(diǎn) then意為“然后”
12、When it did so, it sent sparks down lo the ground and these immediately started a fire.
當(dāng)它這樣做時，把大花送到了地面，這法火花立刻引起了一場大火
語言點(diǎn) so常常用在動詞后表示前句說過的一件事情或者某個動作，避免重復(fù)。