Question

我就不會鴨

想問一下紫色螢光筆中
has been that的用法是什麼?

In March, scientists reported that a new distinct" layer in the Earth had been detected.
Until recently, the standard teaching has been that the Earth is comprised of? four layers:
教書
the crust, mantle4, o'uter Core5, and inner core. The fifth layer is within the inner core,
and is being referred to by geologists' as an inner-inner core. In order to study the inner
core, scientists have used earthquake waves to create images of this region. Over the past
few decades, this imaging has shown some anomalies that scientists cannot account
forº. Some of the data seems to suggest that the core is not entirely solid iron as once
thought. Now mineral physicists and geodynamicists 10 are working to create models that
may help clarify the makeup12 of this newly discovered layer of the Earth.
||| 字詞大補帖
科學家在今年三月公布,他們發現地球有新的明
顯地層。直到最近,標準的教科書都會寫說地球的結
構有四層:即地殼、地函、外地核與內地核。這個第
五層位在內地核裡,地質學家稱之為內內地核。為了
1. distinct [distinkt] a. 明顯不同的
2. be comprised of... 由……組成
comprise [kam praz ] w. 包括,由……
構成
死亡,於完动自重、由编制:
口国

Answer 1

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Bella

Has been現在完成式 that作主詞(standard teaching)補語
原句 the standard teaching is that～

我就不會鴨

所以has been 跟 is 是一樣的？

Bella

不是哦 has been是is的現在完成式
可以自行查詢現在完成式

我就不會鴨

謝謝（∩▽∩）