Question

I could have helped the old man ______ yesterday morning.

A．did I come

B．if I came

C．had I come

D．if I should come

Answer 1

C

試題分析：句意:如果我昨天來(lái)的話我就能幫助那位老人。這是省略if的條件狀語(yǔ)從句，并且是虛擬語(yǔ)氣，從句中有過(guò)去的時(shí)間狀語(yǔ)，所以對(duì)過(guò)去的虛擬謂語(yǔ)應(yīng)該用had done，省略if時(shí)，把had提到主語(yǔ)的前面，故選C。
點(diǎn)評(píng)：本題難度適中。虛擬語(yǔ)氣是高中階段的重要語(yǔ)法項(xiàng)目，需要考生牢記各種情況的虛擬語(yǔ)氣的謂語(yǔ)動(dòng)詞的形式，并要有分析理解語(yǔ)境的能力。
即學(xué)即練：______ smoking, he would not have got cancer in the lung.
A. Was he given up B. Had he given up
C. Did he give D. If he gave up
解析：B。由于主句謂語(yǔ)是would not have got，這表明是對(duì)過(guò)去事實(shí)作出的假設(shè)，所以從句謂語(yǔ)應(yīng)該是 had given up，而不是像D項(xiàng)那樣用一般過(guò)去時(shí)。另外，當(dāng)虛擬條件句中有 had, should, were 等詞時(shí)，通�？梢允÷� if，并將 had, should, were 提前置于句首。