2）need doing = need + 动名词（主动语态）在实际使用上，need doing = need to be done，也即是 need doing 实际上是（主动语态）表（被动）的用法；而 need to be done 是（被动语态）表（被动）。连个句子的最终结果是一样的，但使用 need doing 还是 need to be done 通常可以根据句子...

need doing=need to be done，主动表被动。类似用法还有want, require等。例：The flowers need watering. = The flowers need to be watered.花要浇水了。need to do 需要做某事 延伸：need do 需要做某事，这里need 是情态动词，没有人称变化，后边的动词前没有to。need to do也是需要做某事，...

be needed是被动语态，表示，，，被需要如Enough time is needed.需要足够的时间。need doing=need to be done表示主语需要被做，如 The room needs cleaning/to be cleaned.房间需要打扫。

need to be done是need做实义动词在一般情况下的被动语态。need doing是一个特殊用法，表达被动意义。但是所以这两种表达都是表示被动的。其实need doing=need to be done 需要被… doing现在分词在此表被动“需要被做”，相当于need to be done，如：My watch needs repairing. =My watch needs to...

need to do，需要做某事。need doing=need to be done.需要被做某事。He need to eat more food.他需要吃多点食物。有主动的含义。The chair needs repairing.=The chair needs to be repaired.椅子需要修理。是被修理，被动的。

need doing 是需要被做有被动的意思 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.具体的说：need to do sth实义动词 need doing sth,表示被动 人＋need ＋to do 物＋need ＋doing 物＋need ＋to...

need doing sth. = need to be done 翻译成：需要被做。eg:My bike need repairing.=My bike need to be repaired.我的自行车需要修理一下了~

need to do 需要做某事 need doing 是需要被做有被动的意思 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.

need doing 是需要被做有被动的意思 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.具体的说：need to do sth实义动词 need doing sth,表示被动 人＋need ＋to do 物＋need ＋doing 物＋need ＋to...

need to do 表示主语与need这个动作是主动关系，\r\n如：I need to go now.我现在需要离开了。\r\n而need doing sth表示主语与need这个动作是被动关系，\r\n例如：The windows need cleaning.窗户需要清扫。