2. 虛擬語氣 We hurried back to school lest/ for fear that it （should） rain. 我們匆匆忙忙地趕回學(xué)校，生怕天會(huì)下雨。

　　3. 比較級(jí)the more…the more The more time a person spends on his work， the less time he has to play. 一個(gè)人花在工作上的時(shí)間越多，花在玩耍上的時(shí)間就越少。

　　4. This subject is far more difficult than everybody has previously expected. 這門課程比每個(gè)人以前預(yù)料的還要難得多。

　　5. more than…/rather than… A political figure‘s success depends more on external factors than his own characteristics. 一個(gè)政治人物的成功與其取決于他個(gè)人的特點(diǎn)，不如說取決于外部因素。

　　6. 讓步狀語 Whether you believe him or not， you have to make the decision. 無論你是否相信他，你都必須做出決定。

　　7. no matter what/ who/when/how…， No matter how hard he tried， he couldn‘t persuade his friends to give up the adventure. 無論他怎么努力，都不能說服他的朋友們放棄冒險(xiǎn)。

　　8. despite/in spite of …， He decided to carry out the plan in spite of the protest from his parents. 他決定不顧父母的反對(duì)執(zhí)行他的計(jì)劃。

　　9. 結(jié)果狀語 I broke my glasses so that I couldn‘t see clearly what happened. 我打破了眼鏡，以至于看不清當(dāng)時(shí)發(fā)生了什么事。

　　10. The density of the star has become so great that it may explode at some time. 這顆恒星的密度如此之大，以至于它會(huì)在某一時(shí)刻爆炸。

　　11. 非限定性定語從句 As we expected正如我們所預(yù)料的那樣/ As is well known眾所周知， the project was finished successfully on time. 項(xiàng)目成功地提前完成。

　　12. 形式主語 It‘s no doubt that correct decisions made today will have a good effect on future. 毫無疑問，今天做出的正確決策將對(duì)未來有很好的影響。

　　13. 形式賓語 Many people find it important to keep a good living habit. 很多人認(rèn)為保持一個(gè)良好的生活習(xí)慣非常重要。

　　14. 賓語補(bǔ)足語 The new electronic techniques make possible the effect that has never been created before. 新的電子技術(shù)使得一種從未有過的音響效果成為可能。

　　15. 倒裝句 Not until recently did we realize that language was closely related to culture. 直到最近我們才意識(shí)到語言與文化密切相關(guān)。

　　16. Under no circumstances should you hesitate to offer your opinion as it is. 在任何情況下你都應(yīng)毫不猶豫地說出你真實(shí)的想法。

　　17. 比較狀語such … as … Such people as you described can hardly succeed in nowadays. 像你描述的那種人在當(dāng)今社會(huì)很難取得成功。

　　18. 原因狀語be different/ similar … in that…Robots are different from automatic machines in that they can be reprogrammed to do another job. 機(jī)器人和自動(dòng)化機(jī)器的不同之處在于它能被重新編程完成其它的任務(wù)。

　　19. 賓語從句people hold different attitudes as to… 人們對(duì)于是否應(yīng)該用動(dòng)物做實(shí)驗(yàn)持不同的態(tài)度。people hold different attitudes as to whether animals should be used in experiments.

　　20. 并列句 …not only…but also… Sports can not only benefit our body， but also contribute immensely to mental health. 運(yùn)動(dòng)不僅對(duì)我們的身體有益，而且還極大地有助于精神健康。