1. 將條件隱含在不定式短語(yǔ)中
I should be happy to go with you. 如果能與你一起去，我將很高興。(=I should be happy if I could go with you.)
To have studied harder, you would have passed the examination. 你學(xué)習(xí)更用功些，你早就考及格了。(=If you have studied harder, you…)

2. 將條件隱含在分詞短語(yǔ)中
Born in better times, he would have been a scholar. 如果出生在好時(shí)代，他早就成為學(xué)者了。(=If he had been born in better times, he …)
Failing this time, what would you do？ 假若這次失敗，那你怎么辦？(=If you failed dthis time, what…)
Walking alone in the dark, Mary would be terrified. 要一個(gè)人單獨(dú)在黑暗中走，瑪麗會(huì)感十分害怕。(If Mary walked alone in the dark, she…)

3. 將條件隱含在介詞短語(yǔ)中
Without air, no one could live. 沒(méi)有空氣，人就不能活。(=If there were no air, no one could live.)
But for his help, he would have failed. 要不是有他的幫助，他就會(huì)失敗了。(=It it hadn’t been for his help, he would have failed.)

4. 將條件隱含在名詞短語(yǔ)中
A true friend would not have betrayed me. 若是真正的朋友，就不會(huì)背棄我。(=If he had been a true friend, he would…)
A few hours earlier, and you would have seen the famous writer. 要是你早來(lái)幾個(gè)小時(shí)，你就見(jiàn)到這位著名的作家了。(If you had come a few hours earlier, you…)

5. 將條件隱含在某些連詞中
I didn’t know that he was a cheat, or else I wouldn’t have believed him. 我不知道他是個(gè)騙子，不然我也不會(huì)相信他了。(or else=if I had known he was a cheat)

I’m really very busy, otherwise I would certainly go there with you. 我真的是太忙了，不然我就會(huì)同你一道去了。(otherwise=if I were not so busy)

6. 將條件隱含在定語(yǔ)從句中
Anyone who had seen that painting might have taken it for a photo. 凡是看過(guò)那畫(huà)的人，都可能把它看成是照片。(=If anyone had seen that painting…)

7. 將條件隱含在一定的上下文中
Don’t bother to read all these papers. It would take too long. 不要費(fèi)事看所有這些文件了，那會(huì)花太多時(shí)間。(=…If you read all these papers, It would take too long)