Hello<br/><br/><font color="#2c4863">“What do you think of this?</font><br/><br/><font color="#2c4863">1 I’ve never been so scared as to scream like that.”</font><br/><br/><font color="#0e0e0e">I think it's understandable, but I would never say it. "as to" is not that commonly used in comparison to other expressions.</font><br/><br/>But if the above sentence is not something you'd say,<br/><br/>How come these are correct?<br/><br/>1 Are you so arrogant as to put yourself before 6 million people.<br/><br/>2 Would you be so arrogant as to put....<br/><br/>3 How could you be so stupid as to do that?<br/><br/>Thank you