现在分词,形式为doing（用do泛指所有实意动词）,作宾语时含义为主动、正在进行.如：remember doing sth.意为：记得干过某事.
例句：I remember visiting that place.我记得去过那个地方.
不定式,形式为to do,作宾语时含义为目的、将来发生的.
如：remember to do sth.记得去干某事.
例句：Jim,remember to wash the dishes!吉姆,记得洗盘子啊!
有一种特殊情况---动词是情态动词时,宾语是现在分词时表示被动.如need doing sth.=need to be done
例句：These dishes need washing=These dishes need to be washed.Have you considered taking a course in business for artists?为什么不用to take?consider doing sth：考虑干某事 当它意为考虑时，只能加doing，就像finish只能加doing，是固定用法。意为认为时，用法：consider sb/sth. to be