一般式: being written
过去式: having been written
He was punished by being sent to bed without any supper.
他被罚不让吃晚饭就去睡觉。
I remember being taken to Paris as a small child.
我记得我在儿时被带到巴黎过。
The safe showed no signs of having been touched.
保险箱没有被人动过的痕迹。
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