—Will this fish until tomorrow?—Will this fish keep until tomorrow?—Only if you put it in the fridge.这里面为什么不用be kept?

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—Will this fish until tomorrow?
—Will this fish keep until tomorrow?
—Only if you put it in the fridge.
这里面为什么不用be kept?

keep用作vi.(不及物动词)时有一个含义:“(食物等)保持不坏”,例句是:in such weather meat won't keep long.
不及物动词一般表示一种状态,是没有被动式的,只有及物动词才有被动式,因此这里不能有be kept

应该是要用be kept的

keep做系动词了,比如The day keeps sunny.就是这种用法
像turn,get,continue和感官动词等都可以活用为系动词