是when have you lost the pen还是when have you lost the pen

题目

是when have you lost the pen还是when have you lost the pen
那个语法正确?

答案

现在完成时表示过去开始的动作持续到现在,试问丢笔怎么会丢很久呢?lost是及物动词,表示丢失这一动作.所以这句话用过去时就可以了,即:
When did you lost the pen?