i can never forget the days when we study together.中的WHEN能否用THAT 替代?

Is I never forget you,or you can't remember meIs I never forget you,or you can't remember who i can never forget Is I never forget you,or you can't remember Is I never forget you,or you can't remember me 错了么?Is I never forget you,or you can't remember meIs I never forget you,or you can't remember me 哪里错了? I can never forget her ----- (smile) face. I jiust can't forget I Can T Forget 歌词 Is I never forget you,or you can't remember me, I just can't forget your I can’t forget your love Sorry,I still can't forget you. I can't forget the past Forget you ,I can't do that I can't forget 如题 Forget you.I can't do that I just can,t forget you taste of tear ,I can't forget.. ’< Is I never forget you, or you can't remember me forever love ,forever love,>这句话是什么意思?