Question

remember to do 和doing的用法

Answer 1

remember to do 记得去做某事 (未做)
remember doing 记得做过某事 (已做)

Remember to go to the post office after school.
记着放学后去趟邮局。
Don't you remember seeing the man before?
你不记得以前见过那个人吗?

Answer 2

remember to do 记得去做某事 (未做)
remember doing 记得做过某事 (已做)

Answer 3

前者是记得去做某事，这件事还没有做，
后者是记得做过某事，这件事已经做过了。