havebeen

If he never does anything, or says anything that eludes to a time before page one, then he appears to havebeen born on that page.

如果一个人从来没有做过任何事，或者在第一页之前的所有事都被回避掉了，然后他就这么突然出现在了第一页。

Until recently, scientists havebeen unable to devise a drill which would be capable of cutting through hard rock at greatdepths.

直至今日，科学家尚未能设计出一种能钻透极深处坚硬岩石之钻探机。

He would havebeen delighted to see this dilemma solved by quantum physics andbehavioural biology.

但是他应该会很高兴看到量子物理学和行为生物学解决了这种两难困境。

The answer is twofold, he said. For one thing, findings contrary to the consensus havebeen ignored, but timing is also important.

一是，我们一直忽视了与一致意见不同的发现，然而时机也很重要。

The 'present perfect progressive' is made with have been followed by an -ing form.

havebeen后面跟动词-ing形式，构成‘现在完成进行时’