1. The smoke from the fire was too thick for them to be able to land on the roof. 火煙太濃，直升飛機(jī)無(wú)法在樓頂降落。tooto 太以至于不能 如：My brother is too young to dress himself. 弟弟太小了，不會(huì)自己穿衣服。這句話還可以用so...that...表達(dá)：My brother is so young that he cannot dress himself. 注意不定式前的for：It is too later for him to do anything now.

　　2. The fire lasted about four hours before the firefighters could control it. 大火持續(xù)了大約4小時(shí)，消防人員才將火情控制。注意before的用法：①The teacher asked us some questions before he came to the new lesson. 老師先問(wèn)了我們幾個(gè)問(wèn)題，然后才上新課。②The bell rang before I could finish writing the composition. 我還沒(méi)有寫(xiě)好作文鈴就響了。

　　1. Quick, turn the gas off. 快，把煤氣關(guān)上。掌握幾個(gè)搭配：Turn the TV off. Its time for bed.該睡覺(jué)了，關(guān)了電視吧。 Turn on the light. 開(kāi)燈。Turn it down, please! Its too noisy. 關(guān)小一點(diǎn)，太吵了！Turn it up please. I cant hear it clearly. 把聲音開(kāi)大點(diǎn)，我聽(tīng)不清！代詞總是放在動(dòng)詞turn和副詞之間，而名詞即可放在兩者中間，也可放在副詞后面。

　　2. You might get burnt and you might drop the pan of burning oil. 你可能被燒傷，你也可能把起火的油鍋扔掉。might 表示假設(shè)，本句相當(dāng)于If you tried to carry the pan out of the kitchen, you might get burnt . get burnt 被燒傷，構(gòu)成被動(dòng)語(yǔ)態(tài)的助動(dòng)詞一般用be，但有時(shí)也可以用get，如： My watch got broken while I was playing basketball. 手表打籃球時(shí)摔壞了。He got hurt in the leg when he fell down from the tree. 他從樹(shù)上掉下來(lái)，腿受了傷。

　　3. Break the glass to sound the alarm. 將玻璃打破，讓火警器報(bào)警。sound an alarm / sound a note of danger發(fā)出警報(bào)/發(fā)出危險(xiǎn)信號(hào)。這里sound是及物動(dòng)詞使發(fā)聲：The bell is sounded every hour. 那鐘每小時(shí)響一次。sound還可作不及物動(dòng)詞聽(tīng)起來(lái)：That music sounds beautiful. 那音樂(lè)優(yōu)美動(dòng)聽(tīng)。

　　4. Dont go to your room to collect your things, or you may be trapped by the fire. 不要到住室去取自己的東西，否則你可能被火封堵。collect 收集，如：The teacher walked round the classroom to collect exercise books. (收練習(xí)本) Electricity fees for this month have not been collected. 本月電費(fèi)還沒(méi)有收。

　　5. Perhaps it was started by an electrical fire in the ceiling of one of the offices. 也許這是由于其中一個(gè)辦公室天花板上的電線漏電發(fā)出火花引起的。ceiling和roof的區(qū)別很簡(jiǎn)單：ceiling指的是屋內(nèi)的天花板，而roof指的是屋外的房頂。如：A light is hanging from the ceiling. 天花板上吊著一盞燈。Theres a cat on the roof. 房頂上有一只貓。

　　6. He was the first to arrive and the last to leave.他總是到的最早，走的最晚。在本句中，不定式用作定語(yǔ)。

　　1. The smoke from the fire was too thick for them to be able to land on the roof. 火煙太濃，直升飛機(jī)無(wú)法在樓頂降落。tooto 太以至于不能 如：My brother is too young to dress himself. 弟弟太小了，不會(huì)自己穿衣服。這句話還可以用so...that...表達(dá)：My brother is so young that he cannot dress himself. 注意不定式前的for：It is too later for him to do anything now.

　　2. The fire lasted about four hours before the firefighters could control it. 大火持續(xù)了大約4小時(shí)，消防人員才將火情控制。注意before的用法：①The teacher asked us some questions before he came to the new lesson. 老師先問(wèn)了我們幾個(gè)問(wèn)題，然后才上新課。②The bell rang before I could finish writing the composition. 我還沒(méi)有寫(xiě)好作文鈴就響了。

　　1. Quick, turn the gas off. 快，把煤氣關(guān)上。掌握幾個(gè)搭配：Turn the TV off. Its time for bed.該睡覺(jué)了，關(guān)了電視吧。 Turn on the light. 開(kāi)燈。Turn it down, please! Its too noisy. 關(guān)小一點(diǎn)，太吵了！Turn it up please. I cant hear it clearly. 把聲音開(kāi)大點(diǎn)，我聽(tīng)不清！代詞總是放在動(dòng)詞turn和副詞之間，而名詞即可放在兩者中間，也可放在副詞后面。

　　2. You might get burnt and you might drop the pan of burning oil. 你可能被燒傷，你也可能把起火的油鍋扔掉。might 表示假設(shè)，本句相當(dāng)于If you tried to carry the pan out of the kitchen, you might get burnt . get burnt 被燒傷，構(gòu)成被動(dòng)語(yǔ)態(tài)的助動(dòng)詞一般用be，但有時(shí)也可以用get，如： My watch got broken while I was playing basketball. 手表打籃球時(shí)摔壞了。He got hurt in the leg when he fell down from the tree. 他從樹(shù)上掉下來(lái)，腿受了傷。

　　3. Break the glass to sound the alarm. 將玻璃打破，讓火警器報(bào)警。sound an alarm / sound a note of danger發(fā)出警報(bào)/發(fā)出危險(xiǎn)信號(hào)。這里sound是及物動(dòng)詞使發(fā)聲：The bell is sounded every hour. 那鐘每小時(shí)響一次。sound還可作不及物動(dòng)詞聽(tīng)起來(lái)：That music sounds beautiful. 那音樂(lè)優(yōu)美動(dòng)聽(tīng)。

　　4. Dont go to your room to collect your things, or you may be trapped by the fire. 不要到住室去取自己的東西，否則你可能被火封堵。collect 收集，如：The teacher walked round the classroom to collect exercise books. (收練習(xí)本) Electricity fees for this month have not been collected. 本月電費(fèi)還沒(méi)有收。

　　5. Perhaps it was started by an electrical fire in the ceiling of one of the offices. 也許這是由于其中一個(gè)辦公室天花板上的電線漏電發(fā)出火花引起的。ceiling和roof的區(qū)別很簡(jiǎn)單：ceiling指的是屋內(nèi)的天花板，而roof指的是屋外的房頂。如：A light is hanging from the ceiling. 天花板上吊著一盞燈。Theres a cat on the roof. 房頂上有一只貓。

　　6. He was the first to arrive and the last to leave.他總是到的最早，走的最晚。在本句中，不定式用作定語(yǔ)。