问题
选择题
(2013·皖南八校联考)________ here yesterday,he could have seen Jackie Chan.
A.If Bob has come
B.If Bob came
C.If Bob had come
D.If Bob should come
答案
答案:C
句意:如果Bob昨天来这,他就能见到成龙了。分析句意和句子结构可知,此处表示与过去事实相反的虚拟,故从句应用过去完成时。在虚拟条件句中,如果含有had,were,should等时,if可省略,句子倒装,故此处的If Bob had come也可为Had Bob come。