i remember the days that we spent together这句定语从句的连接词为什么要用that而不能用when

合句I will remember the days .i spent the days with you. 英语定语从句 I still remember the days I spent英语定语从句I still remember the days I spent in beijing.Awhen Bwhat Cthat Dduring I still remember the days ( ) we spent tother.A.when B .which I still remember the days _ we play together填什么?that 还是when?为什么? I will remember the days ___we spent together fotever.A.when B.which C.on which I still remember the days( )you have forgotten.填写先行词 I still remember the days( )you have fprgotten.填写先行词 一道定语从句填空 I always remember the days ( )are my family's birthday i remember the i remember the green whenever i remember the I will remember the days ____ I spent during the holiday.横线处填that 和when都可以吧 定语从句 I still remember the days which I spent in the college先行词the days不是表时间吗?为什么用 which 不用when? I still remember the days that i spent in beijing.that 为什么不可以换成when呢? Even today I still remember the great fun we had( )games on the beach on those happy days. I still remember the days _ we studied togetherA which B where C when Dwith 选哪一项 Try to Remember the Days that u want to Remember!Try to Remember the Days that you want to Remember!`这句话啥意思啊? 请问这两个句子变成定语从句对么?I remember the days .I go hiking with my friends during the days.这两句话合成定语从句是下面哪一种吖?还是两种都是对的?I remember the days which I go hiking with my friends during.I