please refer to PREP 2008 GRAMMAR Notes (P18):
738. The Emperor Augustus, it appears, commissioned an idealized sculptured portrait, the features of which are so unrealistic as to constitute what one scholar calls an “artificial face.”
A. so unrealistic as to constitute
B. so unrealistic they constituted
C. so unrealistic that they have constituted
D. unrealistic enough so that they constitute
E. unrealistic enough so as to constitute
Key: A
If "so as to" cannot be followed by an action verb, why "constitute" is OK in this case?
And I am wondering why B and C are improper.
-- by 会员 meimeijulia (2012/11/2 11:22:12)