在so... that…结构中，若将so+adj. / adv. 置于句首，则其后的主句要用部分倒装。如：
So cold was the weather that we had to stay at home.
So much did they eat that they could not move for the next hour.
So loudly did he speak that even people in the next room could hear him.
So fast does light travel that we can hardly imagine its speed.
So sudden was the attack that we had no time to escape.
Such a nice man did he seem that we all believe him.