“我忘不了他”常见的英语表述有:“I can't forget him.” 或者 “I won't forget him.”
“can't”侧重于表示“没有能力、做不到”,“I can't forget him.” 强调因为某种原因,主观上没有忘记他的能力,比如他给自己留下的印象太深刻。
例如:The moments we shared together were so precious that I can't forget him. (我们一起度过的时光太珍贵了,以至于我忘不了他。)
“won't”侧重于表示“不愿意、不想”,“I won't forget him.” 更强调主观上不愿意忘记,是一种坚决的态度。
例如:He was so kind and helpful, I won't forget him. (他是如此的善良和乐于助人,我忘不了他。)