i'm sorry()so long,i forgot to tell you in advance where i had put my key.这里有明显的现后关系吗?只因为forgot是用的过去式,所以要用完成时态吗?完成时态只能在谓语动作之前的动作才能用吗?难道就没有别

来源：学生作业帮助网 编辑：作业帮 时间：2024/08/30 17:53:18
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