he arrived after a week请问arrive为什么用过去式arrived,不是还没发生吗?

he arrived after a week请问arrive为什么用过去式arrived,不是还没发生吗? i think he have been arrived?arrive不是不及物动词吗?怎么后面不用接介词呢? 为什么是when did he arrived?不是when was he arrived （ ）Do you know when he ____?A arrive B will arrive C arrived He arrived the week before last中文 二、选择填空( ) 1.He told me that he ______.A.arrive B.had arrived he will arrive after a week 错哪里了 he were sleeping when the UFO arrived.为什么用were 一个语法问题.when he arrived.本来这句翻译是当他到的时候.说明是将来发生的事,怎么arrived是过去式 When he arrived I was having a bath. When后面不是跟持续的动作吗 he arri ARRIVE 是不及物动词!为什么可以说When I arrived. If only i ____in time!A、arrive B、arrived C、have arrived D、ha