he must have an accident,or he ()here then.应该填什么?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 18:04:18

had been
or 是虚拟语气的提示词
must have done 是对过去的肯定推测,表明是过去式
虚拟语气的时态是退后一个时态,那么原来的过去式,在虚拟语气中,就变成过去完成时,had been
再问：这里不是done, must have an accident 是对现在的猜测
再答：哦，看错了，那就是填，should have been 仍然是虚拟 should have done 表示本应该做，实际上没有做他一定是出车祸了，否则的话，他应该在这了（实际上没到）
再问：也可以是would be啊，也表示推测啊，跟then有没有关系，那时，表示过去什么的。
再答： would be 不能表示本应该做，实际没做的效果，他只能表达，她就会在这里了
再问：对啊，就是他如果没有出意外的话，他就会在这里了，这样表达也没问题吧，我搞不懂，他们翻译过来意思差不多。
再答：意思不一样啊她本来应该在这里，结果没在，含有责备，遗憾的口吻她就会在这里，没有那个含有责备，遗憾的口吻

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