一、
need to do 需要做某事
need doing 是需要被做有被動(dòng)的意思
如;I need to wash my clothes.
My clothes need washing.
need doing = need to be done
I need to mend my bike.
My bike needs mending
二、
need to do 一般主語(yǔ)是人
need doing 一般主語(yǔ)是物
三、
need to do sth 是必須做某事 但還沒(méi)做過(guò) 、
need doing sth 是 需要做某事 已經(jīng)做完了.