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，但need 是行为动词，有人称变化，后面的动词要用不定式。例：He need water the flowers. = He needs to water the flowers. 他要给花浇水了。 如果满意请采纳为最佳答案，谢谢啦！
require to be done需要被做双语对照例句:1.But there is still much work to be done. 尽管如此，警署仍然面临大量待做的工作。 2.Some countries even require that a foreign firm be "invited" before their personnel arepermitted to cross the borders-this is done regardless of who is buying or selling. 有些国家甚至要求外国公司入境之前，应该受到要求---不论是买方还是卖方。 3.You know what needs to be done, and not afraid to make the decisions. 2.你知道该采取什么行动而且不惧做出决定
1. need to 作情态动词，通常用于疑问句、否定句、条件句、 whether(if) 名词从句或含否定意义的句子中。如： I do not see why we need discuss it further. 我看我们没有必要讨论下去了。 That's all settled. It needn't be talked about. 那已全部解决了，没有必要再说了。 He asked me whether he need attend the meeting? 他问我他是否有必要出席这次会议？2. need 又是实义动词，各种变化和用法与普通实义动词相同。如： They need a rest after a long walk. 长距离行走后他们需要休息一下。 I need you to work for me, young man! 小伙子，我需要你为工作。3. need 接动名词主动形式，表示被动意义、这时动名词和主语之间有动宾关系， need doing 可转换为 need to be done 结构，意思相同。如： My hair needs washing badly. (= My hair needs to be washed badly.) 我的头发非常需要洗一洗。 The garden needs watering. (=The garden needs to be watered.) 花园需要浇水。
需要被做某事，通常以事物作主语。例句：The room requires to be cleaned.房间需要被打扫。注：require doing 是用动名词形式表示被动意义，表示需要被做某事，与require to be done意思相同。The mechine requires fixing.机器需要被修理。The room requires cleaning.房间需要被打扫。
Incana1992
