倒装句
全部倒装
主+谓 => 谓 + 主
部分倒装（重点）
Only on one occasion have I ever felt frightened.
结构：主+谓 => 辅助谓语 + 主语 + 实义谓语
场景：
- Only提前用于句首
- 否定代词提前(few, little, never)
原因：强调
1．否定副词位于句首，要倒装。
Hardly did I think it possible. 我并不认为这是可能的。
常用的否定副词：never, seldom, rarely, little, hardly, scarcely, nowhere, no sooner
Never have I read such stories. 我从来没有 读过这样的小说。
Nowhere can he find the book he wants. 无论在哪儿他都找不到他想要的那本书。
Rarely in recent years has a routine inaugural trip of a head of government been watched with such keen interest at home and abroad.
2．含有 only 的状语位于句首，句子要倒装
Only at night do bats leave their cave.
Only when you go will I go.
Only by studying hard can you do well on the test.
Only then did he realize that he had made a mistake.只有到那个时候，他才认识到自己犯了个 错误。
Only when a great deal more information has been obtained will it be possible to plan a trip. 只有获得比较多的信息之后，才有可能计划去旅行。
3．so,such 位于句首，句子也要倒装。
He was so surprised that he couldn’t say a word.
So surprised was he that he couldn’t say a word.
Such was his surprise that he couldn’t say a word.
Amy was so sad that she cried her heart out.
So sad was Amy that she cried her heart out.
Such was Amy’s sadness that she cried her heart out.
4．还有 not 的副词短语位于句首，要倒装。
not for a moment, not in the least , not for an instant, not until
Not in the least is he interested in English literature. 他对英国文学一点都不感兴趣。
Not for an instant did I believe he had lied.
5．含有 no 的短语位于句首，句子要倒装。
at no time, in no way, in no sense, by no means, in no case, on no account, on no condition , under no circumstances.
Under no circumstances can we accept the check.无论如何我们不能接受这笔钱。
On no account must you leave the baby in the house.你无论如何也不能把婴儿留在房间 里。