倒装So sudden (was the attack) that the ememy had no time.
问题描述：
倒装So sudden (was the attack) that the ememy had no time.
为什么不可以用 did the attack so提前不是要部分倒装吗?was 提前了不是完全倒装了?
答
我为你比较一下,这样你会清楚一些.
1 The attack was so sudden that the ememy had no time.
主句的动词是was,在变成倒装句时不能写成------did -- - be.所以只能是was提前：
So sudden WAS the attack that the ememy had no time.
2 The attack CAME so suddenly that the ememy had no time.
主句的动词是came,在变成倒装句时必须写成------did- -- -come,就成了半倒装(==助动词+真正动词)：
So suddenly did the attack come that the ememy had no time.
现在,你明白了吗?