done,to be done ,being done 的区别与用法
done,to be done ,being done 这三种形式,除了都是表达被动概念以外,在时间上有分别。
1、The building built last year is a hospital.去凳旦年建造的那栋大楼是所医院..
2、The building to be built will be a hospital.即将建造的大楼是家医院.
3、The building ,being built at the moment is a hospital.在建的那栋大楼是家医院.
如：
The new houses are being painted.这些新房子还在刷漆。
When I went to pay him a visit, he was being examined by a doctor. 当我去看他时，他正搭粗册在接受医生的检查。
如：
The meeting being held now is of great importance. 现在正在开的会很重要。
上面的句子也可以变成含有定语知宏从句的句子：
The meeting which is being held now is of great importance.
注意：being done，to be done与done均可作后置定语，其区别为：being done表示正在发生的被动动作；to be done表示将要发生的被动动作；而done表示已经发生的被动动作。
如：
The house to be built here next year belongs to Fred. 明年将在这里建的房屋是弗雷德的。
The house built here last year belongs to Fred. 去年在这里建的房屋是弗雷德的。
如：
John hates being laughed at in public. 约翰不喜欢当众被嘲笑。
Do you mind being left alone at home. 把你一个人留在家里你介意吗？
My class teacher was honoured for being devoted to the cause of the education. 我的班主任因致力于教育事业受到了表彰。
如：
Being lost can be a terrifying experience.迷路可能是一种可怕的经历。（作主语）
He heard the song being sung next door. 他听到隔壁有人在唱这首歌。（作宾补）
