DB和D有区别，忘记已做某事，用forget doing，即forget后面加动名词，如：Shall you ever forget hearing her sing?Never shall I forget hearing her sing.I forget posting it.I forgot (about) doing it.forget后接动词不定式表示忘记去做某事的意思，也就是说这个事情没有做。比如：I forgot to buy the book that you recommended.He forgot to return the money that he had borrowed.This is...
