求翻译和解释这道高中语法题：I remember ( him once offering ) to help us if we ever got into trouble

Question

求翻译和解释这道高中语法题：

I remember ( him once offering ) to help us if we ever got into trouble.

A. once offering B. him once offering
C. him to offer D.to offer him

Answer 1

我记得他曾说过，当我们有困难时他会帮我们。

remember to do sth.记得要做某事（还没做）
remember doing sth.记得做过某事（已经做了，现在记起来了）
remember sb. to do sth.记得某人要做某事（还没做）
remember sb. doing sth.记得某人做过某事（已经做了，现在记起来了）