so+adj／adv 倒装，完全倒装，部分倒装问题

Question

So cold was the weather that we had to stay at home.
次句话中应该采用部分倒装，部分倒装是系动词+主+谓
若将这句话还原应是：the weather was so cold that we.....
也就是说，was在句中是谓语，the weather 为主语，
问题：那倒装后的句子就是谓语+主语了，不就是完全倒装了吗。

Answer 1

这是一种部分倒装。
程度副词放在句首的时候，全句需要部分倒装。如：
Well do I remember the promise you made last year.
So beautiful is Emily that I am head over heels in love with him.
So boring a lecture was it that half of the students fell asleep.
希望我能帮助你解疑释惑。