题目内容
6.If I __________ it with my own eyes,I wouldn't have believed it.( )| A. | didn't see | B. | weren't seeing | C. | Wouldn't see | D. | hadn't seen |
分析 如果我没有亲眼所见,我是不会相信的.
解答 答案:D.根据题干中主句的谓语动词wouldn't have believed 为"would have done"结构可知,本句是对过去情况的假设,由此可推知,从句if引导的虚拟条件句中的谓语动词应用had done来表示对过去情况的假设,故选D.
点评 此题考查if条件句中虚拟语气的用法.if条件从句的虚拟情况有三种形式:①如对现在情况假设:if条件从句的谓语动词形式为过去式(be为were),主句的谓语动词形式为would/could/might/should do②如对过去情况假设:if条件从句的谓语动词形式为had done,主句的谓语动词形式为would/could/might/should have done ③如对将来情况假设:if条件从句的谓语动词形式为were/did;should do;were to do,主句的谓语动词形式为would/could/might/should do.解此类题的关键是要判断对什么时间的假设,再而确定谓语动词的正确形式.
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