it might have been that Righty woke up,but Lefty doesn't wake up,doesn't survive the operation.
问题描述：
it might have been that Righty woke up,but Lefty doesn't wake up,doesn't survive the operation.
have been这里怎么理解
that是表语从句么
doesn't survive the operation.的主语是什么
答
might have been是对过去发生事情的一种推断,翻译为“可能是...”
that Righty woke up是表语从句,而it是虚主语；
doesn't survive the operation.的主语是Lefty这个人