Simonemighthavebeen和coundhavebeen的区别
的有关信息介绍如下：
都是虚拟语气.但是使用的场景不同.might have been 多用于猜测,比如：He might have been to Beijing.他大概去过北京.You might have said this before.（猜想）你也曾说过这些话.could have been多用于原本可以（能力上可及）的事情却没有做.比如：I could have caught up with you. 我本来可以来和你们聚会的(但却没有去).I could have been upset.我本来应该不高兴的（但是没有）希望对你有帮助~
