OG12 SC13 语法求助。。。

yknxhdsy

OG12-SC13

A surge in new home sales and a drop in weekly
unemployment claims suggest that the economy might
not be as weak as some analysts previously thought.
(A) claims suggest that the economy might not be
as weak as some analysts previously thought
(B) claims suggests that the economy might not be
so weak as some analysts have previously
thought
(C) claims suggest that the economy might not be
as weak as have been previously thought by
some analysts
(D) claims, suggesting about the economy that it
might not be so weak as previously thought by
some analysts
(E) claims, suggesting the economy might not be as
weak as previously thought to be by some
analysts

请问D,E的选项里的suggesting是什么用法？？？为什么说却谓语呢？

yknxhdsy

十分感谢！