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could have 是什么句子?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/10/06 14:44:29
could have 是什么句子?
Who could have predicted that within ten years he'd be in charge of the whole company?
请问could have 是什么句型?整个句子是什么句型?
是虚拟语气.