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i had just lost 50 and i felt very upset句子中为啥用had而不用was?

i had just lost 50 and i felt very upset句子中为啥用had而不用was?

的有关信息介绍如下:

i had just lost 50 and i felt very upset句子中为啥用had而不用was?

首先,本句是并列结构后方有felt,本句整体时态为过去式。其次,lost是lose的过去分词形式,前面不能再用过去式。再次,本句用had是过去完成时时态,表示过去的过去;本句时态为过去式,lose的动作发生在本句之前。