having been done作状语是 表示被动,完成,还是被动完成都有
人气：380 ℃ 时间：2019-12-13 15:18:16
解答
非谓语中,having been done 是现在分词完成被动式,用作原因/时间状语时,现在分词完成被动式可以与过去分词互换使用,但更趋向于用过去分词.就是,having been done 和done都可以作原因状语,只是done用得比having been ...
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