时态区别during the last two weeks during the night 为什么前者是跟现在完成时,而后者跟过去时?

during the last twoyears用于什么时态 时态区别during the last two weeks during the night 为什么前者是跟现在完成时,而后者跟过去时? 时态区别during the last two weeks during the night 为什么前者是跟现在完成时,而后者跟过去时? during the three days 做状语时的时态during the last three days 做状语时的时态 during the last few years与during the last a few years有区别吗? in the last two years/during the last two years/in the past two years/during the past two years有什么区别? during the summer holiday是什么时态 during the last decade of the 19th century 与什么时态连用?Millions of immigrates------ in Europe during the last decade of the 19th century A.has arrived B.had arrived C.arrived选哪个,为什么? two years ago 和the last two years 在使用时态上的区别（有木有啊） ..the last few days 现在完成时的时态吗?last day 不是过去时的么 着两个什么有区别呃 为什么表示不同的时态 in the last few years是什么时态 in the last years用什么时态? in the last 10 什么时态 over the last three years什么时态? over the last 用什么时态? during the past 50 years用于什么时态 During the past century需要涉及的时态是什么啊? at the night & during the night区别?