They considerde such cicumstances___ for a long time为啥填to have existed为什么不是被动语态?

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They considerde such cicumstances___ for a long time为啥填to have existed为什么不是被动语态?
They considerde such cicumstances___ for a long time
为啥填to have existed为什么不是被动语态?

They considerde such cicumstances___ for a long time为啥填to have existed为什么不是被动语态?
exist表示存在不用于被动

这是主动表被动