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had been done & having been done 区别

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had been done & having been done 区别
All the flights____because of the snowstorm,we had to take the train instead.
A.were canceled B.had been canceled C.having canceled D.having been canceled
为什么不是B,不是应该用过去完成时吗?
had been done & having been done 区别
这是独立主格结构,不是谓语动词,所以不能用had been done,只能用现在分词完成时的被动式.如果你用had been done,we 的前面就必须加一个and 或其他的并列连词了.
had been done & having been done 区别 having been done和had been done的区别 being done having been done的区别 Having been done ,done的区别 having been done和done的区别 had been done had done区别 Having been done ,done,having done 关于having been done 和 have been done的区别 having been done和have been done的区别 HAVING BEEN DONE和HAVE BEEN DONE有什么区别? having been done 和 done having been done和having done的区别