do you forget 和 have you forgotten的区别
新概念第三册24课课后练习有这个选择题 ‘ ______ that I was a medical student once upon a time?’ (1.22)
a．Why don't you remember
b．Have you forgotten
c．Do you forget
d．Have you not remembered
但是书上课文中有原文：“You forget that I was a medical student once upon a time.”
为什么选B,C为什么是错的?