英语时态语法问题,

题目

英语时态语法问题,
Tom ___（work） in the library every night over the last 3 months.用什么时态，一般ing过去时对吗 全错，我去。应该是has been working

答案

答：in/over/during the last/ past N years,作状语,多用现在完成时或现在完成进行时,如：
Great changes have taken place in the past 30 years.
Tom has been working in the library every night over the last 3 months.
译：在过去的三个月里,汤姆每天晚上都在图书馆上班.