倒装句的构成

a)完全倒装 b) 部分倒装

In came the headmaster, followed by a group of teachers.

将句子的主语和谓语完全颠倒过来， 称之为完全倒装。

Seldom have we felt as comfortable as here.

只将助动词、系动词或情态动词移至主语之前， 谓语的其他部分仍保留在主语的后面， 称之为部分倒装。