这有2组句子。有什么不同(主要强调意思上有什么不同)。
A1: I remember locking the door.
A2: I remember to lock the door.
B1: I forgot to lock the door.
B2: I forgot locking the door.
C1: I regret to tell you that you are not a good student.
C2: I regret telling you that you are not a good student.