问题
选择题
—Any information about your son?
—No. If only I ______ those tough words to him.
A．didn't say
B．hadn't said
C．shouldn't have said
D．couldn't have said
答案
答案：B
if only 引起的句子要用虚拟语气。与wish跟从句用虚拟的规则一样。与过去的事实相反，用过去完成时态。