Little did we expect that he would fulfill his task so rapidly.
在倒装结构的考查上，主要注意以下几点：
1）下列否定词及含有否定意义的词组若置于句首，句子的主谓要部分倒装：never, no, neither, not only, hardly, scarcely, little, seldom, rarely, not until, nowhere, at no time, in no sense, by no means, under no circumstance。
◆直到昨天他才改变了主意。
Not until yesterday did little John change his mind.
2）以only修饰状语（副词，介词短语，状语从句）开头的句子，句子的主谓要部分倒装： only then, only at that time, only once, only in this way, only with, only through, only by, only when, only after, only because。
◆只有当你获得了足够的资料，你才能得出令人信服的结论。
Only when you have obtained sufficient data can you come to a convincing conclusion.
3）neither和nor“也不”，表示对前一句否定句的赞同，所在句子使用部分倒装。
◆我还没有读完那本法语书，他也没有。
I didn’t finish reading that French book, neither did he.