1.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 frightened was she that he did not dare to move an inch.
她害怕得很，动也不敢动。
So cold was the weather that we had to stay at home.
天气太冷，我们只好呆在家里。
So much did they eat that they could not move for the next hour.
他们吃得太多了，一个小时都动弹不得。
So loudly did he speak that even people in the next room could hear him.
他讲话声音那么大，隔壁屋里的人都听得见。
So fast does light travel that we can hardly imagine its speed.
光速很快，我们几乎没法像它的速度。
So sudden was the attack that we had no time to escape.
袭击来得非常突然，我们来不及逃跑。
2.类似地，当such…that…结构的such…置于句首时，such后的句子也要使用部分倒装。如：
Such a nice man did he seem that we all believe him.
他如此的和蔼，所以我们都喜欢他。
3. such…that 结构中，当 to such a degree , to such an extent , to such lengths , to such a point 等介词短语位于句首时，句子也要部分倒装：
To such length did she go in rehearsal that two actors walked out.
她在排演中搞得太过分，以致两名男演员退出不干了。
To such an extent did his health deteriorate that he was forced to retire.
他的健康恶化到如此程度，只好被迫退休了。