need+to be done和need +doing的区别

need doing=need to be done 需要被做…
　　doing现在分词在此表被动“需要被做”，相当于need to be done，
　　如：My pen needs repairing. =My pen needs to be repaired.
我的钢笔需要被修
The flowers ndee to be watered =The flowers need watering。花需要浇水了（被浇灌）　　
扩展：
　　need to do，如：need后加不定式，证明need为实义动词，而非情态动词，这时need有人称和数的变化，如：
　　.we need to drink。
　　You need to help him to learn English well.

　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 be repaired.
　　我的手表需要被修
　　扩展：
　　need to do，如：need后加不定式，证明need为实义动词，而非情态动词，这时need有人称和数的变化，如：
　　He needs to get up early.
　　You need to help him with his English.

主语不一样啊，to be done 的主语是事情，需要被完成；doing的主语是人，需要去做某件事情。

want need require

在做“需要时”，三者用法相同

都是want/need/require+to be done=want/require/need +doing

sth need to be done
sb need doing sth
一个是物作主语，一个是人作主语