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i had opened the box 和 i have opened the box

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/20 01:04:24
i had opened the box 和 i have opened the box
i had opened the box 和 i have opened the box 什么区别 分别啥意思 had 和 have 怎么用
had opened the box 此句用的是“过去完成时,是相对过去来说的.
如:I told (过去)him that I had opened(过去的过去) the box.
i have opened the box 用的是现在完成时,强调对现在的影响