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could be done是什么时态的被动语态

回答
瑞文问答

2021-09-16

从情态动词could是can的过去式来看,could be done是一般过去时态的被动语态。
例句:
This could be done in many ways.
为了达此目的,可以采用许多方法。
But what could be done now?
可是现在还能作什么呢?

扩展资料

  This, too, could be done at low cost。

  这样也只需要花费很低成本。

  He being absent, nothing could be done。

  由于他缺席,什么事也没法干。

  There was nothing that could be done now。

  特尼现在做什么也无济于事。