If you hadn't gone with Tom to the party last night,__________.
问题描述：
If you hadn't gone with Tom to the party last night,__________.
A.you won't have missed Joan
B.you will have met Joan
C.you would have met Joan
D.you would meet Joan already
A和C有什么不同，
答
C
“If you hadn't gone with Tom to the party last night”解释为“如果你昨晚没和tom一起去party”,是已经发生的不能改变的事实,这里用虚拟语气“hadn't gone”,所以主句中用过去式表示在过去可能发生的事情.