如题所述
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。追答
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。追答
doing是动名词做宾语主动表示被动。
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第1个回答 2019-12-25
be needed被动结构。need doing和need to be done是相同的，都是主动表被动。指主语是物时的用法。仔细看下面例句哦！Two desks are needed in my room.我房间需要两张课桌。
The desks need cleaning/to be cleaned.桌子需要清干净。
The desks need cleaning/to be cleaned.桌子需要清干净。
第2个回答 2019-12-24
need做行为动词物作主语时，后面的动词用ing或者说to be done。
作主语时，后面动词用不定式to do。
You need to wear warm clothes.
Your shoes need washing.
=Your shoes need to be washed.
作主语时，后面动词用不定式to do。
You need to wear warm clothes.
Your shoes need washing.
=Your shoes need to be washed.
第3个回答 2019-10-21
need doing= need to be done 需要被做某事
be needed to do sth 需要某人或者某物来做某事
be needed to do sth 需要某人或者某物来做某事
