请帮我造三句句子...(动词不定式的完成进行时)形式:to having been doing 要三句.

动词不定式的完成进行时应该是to have been doing，表示的动作在谓语动词表示的动作之前一直在进行，eg：we are happy to have been working with you.我们很高兴这一段时间和你们在一起工作。

You ought to having been reviewing before the final examation.you supposed to having been fogorting the bad news.you were requested to having been reading the notice.