石油树脂的生产原理:the old year has pasted还是past\passed
来源:百度文库 编辑:高校问答 时间:2024/10/06 17:05:56
两者皆可.
pass 动词,过去分词为passed或者past
根据句意, 应为现在完成时,即HAVE/HAS+动词过去分词.
注:PAST单独作为一词时为介词,无过去式和过去分词.
passed
pass可以作动词,而past 是一个介词
past 是pass的过去分词,past
pass 动词,过去分词为passed或者past
past 介词,不能在词尾加-ed
past是动词
pass是介词
这里当然是用动词past,似乎past的过去分词还是原型
passed
the old year has pasted还是past\passed
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