Question

Simon is very regretful. If he had been more careful, he _____ such a big mistake.

1. A.
   hasn’t made
2. B.
   hadn’t made
3. C.
   won’t have made
4. D.
   wouldn’t have made

Answer 1

D
試題分析：句意:西蒙是很后悔的，如果他再仔細(xì)點(diǎn)，他就不會(huì)犯這么大的一個(gè)錯(cuò)誤。這里是虛擬語(yǔ)氣，根據(jù)had been可以看出是對(duì)過(guò)去的虛擬，故主句用would have done的形式，根據(jù)句意故選D。
考點(diǎn)：考查虛擬語(yǔ)氣的用法。
點(diǎn)評(píng)：本題難度適中。虛擬語(yǔ)氣是近幾年高考的熱點(diǎn)，虛擬語(yǔ)氣的情況復(fù)雜，形式多樣，需要考生牢記它們的不同的用法，再根據(jù)不同的語(yǔ)境分析句子應(yīng)該用哪種情況的虛擬。這里是從句和主句都是對(duì)過(guò)去的虛擬。
即學(xué)即練：Tell John not to leave the house unless he _____that the lights ______ .
A. will make sure, turn off     B. makes sure; are turned off
C. will make sure; will turn off    D. makes sure; will be turned off
解析：B。第一空在條件狀語(yǔ)從句中用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)；第二空所有的燈被關(guān)掉。