把borrow改延续是keep ,如果句子前面是过去时（前面人称是第一）,那后面应该是have kept还是had kept
问题描述：
把borrow改延续是keep ,如果句子前面是过去时（前面人称是第一）,那后面应该是have kept还是had kept
是直接改间接的时候
答
had kept
请参考此例句：
After the funeral,joe and bob revealed a secret which they had kept for over fifty years.
葬礼之后,乔和鲍勃透露了他们保守了长达50多年的秘密.