每年，在世界的某些地方都會(huì)發(fā)生飛行事故。

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Every year, some place in the world, an accident involving an airplane occurs. These accidents are painful because of great numbers of passengers that they carry. Although these are few in number, a great, many people die when even one airplane crashes. Even with the problem of terrorism, the chance rate is low for airplane crashes. Statistics show that you are many more times likely to be killed in a car accident than in a plane crash. Thousands of planes fly around the world each minute of every day. Despite this, we rarely hear of air accidents. People use their emotions instead of logic in dealing with the problems of air travel. With the coming of modern emergency measures and air safety, airplane accidents are actually beginning to decline in number. The reasons for airplane accidents are usually because of pilot error. Other problems can come when the plane hits a rocky air stream or rough weather. Regular overhauls of the planes can help to deter many of these mechanical problems. Pilots can also be rotated more to decrease fatigue or other personal hazards. If precautions are taken, many airline incidents could have been avoided.


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每年，在世界的某些地方都會(huì)發(fā)生飛行事故。由于飛機(jī)承載大量的乘客，所以這些事故讓人痛心。盡管飛行事故數(shù)量很少，但即便一架飛機(jī)墜毀，就會(huì)有很多人喪生。事實(shí)上，即便有恐怖主義的問題存在，墜機(jī)的幾率還是很低的。統(tǒng)計(jì)數(shù)據(jù)表明，相對(duì)于墜機(jī)而言，一個(gè)人更有可能死于車禍。每天，每分鐘，全世界有數(shù)千架飛機(jī)在飛行。盡管這樣，我們還是很少聽說空難。人們?cè)趯?duì)待飛行問題時(shí)，往往憑借情感而非邏輯。隨著現(xiàn)代緊急措施和空中安全的應(yīng)用，飛行事故的數(shù)量實(shí)際上開始不斷減少。飛行事故通常是由飛行員的錯(cuò)誤而引起的。其他問題可能是技術(shù)上或電力系統(tǒng)的原因，比如導(dǎo)航系統(tǒng)。當(dāng)飛機(jī)遇到波動(dòng)氣流或壞天氣時(shí)也可能出現(xiàn)問題。定期檢查飛機(jī)有助于阻止許多技術(shù)問題的產(chǎn)生。可以增加飛行員輪流值班的次數(shù)以減少疲勞和其他個(gè)人危險(xiǎn)行為的發(fā)生。如果采取了預(yù)防措施，許多飛行事故都可以避免。

語法小結(jié) Grammar
時(shí)間狀語從句

時(shí)間狀語從句是比較常見的一種狀語從句，它可以由when, while, as, before, after, till, until等引導(dǎo)。

1.由when, while, as 引導(dǎo)

When you think you know nothing, then you begin to know something.

當(dāng)你以為自己一無所知的時(shí)候，你就開始知道一些事情了。

Strike while the iron is hot.

趁熱打鐵。

Our teacher laughed as she spoke.

老師邊說邊笑。

注意：when, while 和 as 的區(qū)別在于：when 引導(dǎo)的從句的謂語動(dòng)詞可以是延續(xù)性動(dòng)詞，也可以是瞬時(shí)動(dòng)詞，when 有時(shí)表示“就在那時(shí)”；while 引導(dǎo)的從句的謂語動(dòng)詞必須是延續(xù)性的，強(qiáng)調(diào)主句和從句的動(dòng)作同時(shí)發(fā)生，while 有時(shí)還可以表示對(duì)比；as 表示“一邊……一邊……”，引導(dǎo)延續(xù)性的動(dòng)作，一般用于表示主句和從句動(dòng)作同時(shí)發(fā)生。

2.由before和after引導(dǎo)

My father had left for America just before the letter arrived.

我爸爸在到信之前去美國了。

Please let me know after you decide.

你決定后請(qǐng)讓我知道。

3.由till或until引導(dǎo)

I didn't go to bed until/till I finished my homework.

我作業(yè)做完了才睡覺。

It was not until the class was over that he began to teach me English.

直到下課之后他才開始教我英語。

家庭總動(dòng)員 Do it together


兩人一組，一方朗誦下面的中文句子，另一方說出相對(duì)應(yīng)的英語句子。

1.他走了以后我才知道這件事情。

2.你做完作業(yè)以后告訴我。

3.你鎖門的時(shí)候注意到了嗎？

4.飯前要洗手。

5.我下車時(shí)看到他了。

1.I saw him as I getting off the bus.

2.I didn't know that until he left.

3.Please wash your hands before eating.

4.Tell me after you finish your homework.

5.Do you notice that when you lock the door?