would be done是什么时态

过去将来完成时。如：He said that something would be needed to finish the task.他说要完成这项任务，需要某种条件。It was said that they would be selected by lottery.据说他们将抽签选出。

过去将来时的构成

肯定句：

（1）主语+be（was或were）going to+动词原形（v.原）+其它

（2）主语+would+动词原形+其它

（3）was/were+动词不定式

否定句：

（1）主语+be not（wasn't或weren't）going to+动词原形+其他

（2）主语+would not+动词原形+其它

疑问句：

（1）Be（Was或Were）+主语+going to+动词原形+其它

（2）Would+主语+动词原形+其它

被动语态

（1）would+be+动词的过去分词（done）

（2）was/were+going to be+动词的过去分词（done）