－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
网友回答
A. didn’t say
B. hadn’t said
C. shouldn’t have said
D. couldn’t have said
解析： 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。虚拟语气。句意：——有没有你儿子的消息呢？——没有，要是我没有跟他说那些狠话的话该多好啊！