tony will never forget the days...he spent with hi

问题补充：

tony will never forget the days...he spent with his mother in the countrywhen还是that.别复制

答案：

这里应该用that.

区分when还是that要看其在句子里充当的成分,when等关系副词,在句子里充当状语；that、which等关系代词,在句子里充当宾语或主语.

这里spent 后缺宾语,应该用关系代词,that.