Lesson53 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..
本文語(yǔ)法：現(xiàn)在完成進(jìn)行時(shí)
一句話總結(jié)：現(xiàn)在完成進(jìn)行時(shí)表示過(guò)去某時(shí)開(kāi)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(dòng)作?，F(xiàn)在完成進(jìn)行時(shí)即現(xiàn)在完成時(shí)和進(jìn)行時(shí)的復(fù)合時(shí)態(tài)（has/havebeen + doing)。
How long have you been walking?你走了多長(zhǎng)時(shí)間？
He has been thinking of how to succeed.他一直在想如何獲得成功。
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(chǎng)森林大火。
語(yǔ)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(shí)起，他們一直試圖找出起火的原因。
語(yǔ)言點(diǎn) 辨析：begin, start
begin強(qiáng)調(diào)從零開(kāi)始，反義詞是end。
start常常是指中斷后又開(kāi)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(shí)常由破碎的玻璃渣子或人們隨手扔掉的煙頭引起。
語(yǔ)言點(diǎn)1 本句中which引導(dǎo)定語(yǔ)從句。
語(yǔ)言點(diǎn)2 broken過(guò)去分詞作定語(yǔ)，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。
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(yǔ)法：現(xiàn)在完成進(jìn)行時(shí)
一句話總結(jié)：現(xiàn)在完成進(jìn)行時(shí)表示過(guò)去某時(shí)開(kāi)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(dòng)作?，F(xiàn)在完成進(jìn)行時(shí)即現(xiàn)在完成時(shí)和進(jìn)行時(shí)的復(fù)合時(shí)態(tài)（has/havebeen + doing)。
How long have you been walking?你走了多長(zhǎng)時(shí)間？
He has been thinking of how to succeed.他一直在想如何獲得成功。
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(chǎng)森林大火。
語(yǔ)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(shí)起，他們一直試圖找出起火的原因。
語(yǔ)言點(diǎn) 辨析：begin, start
begin強(qiáng)調(diào)從零開(kāi)始，反義詞是end。
start常常是指中斷后又開(kāi)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(shí)常由破碎的玻璃渣子或人們隨手扔掉的煙頭引起。
語(yǔ)言點(diǎn)1 本句中which引導(dǎo)定語(yǔ)從句。
語(yǔ)言點(diǎn)2 broken過(guò)去分詞作定語(yǔ)，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。