倒装句
1. 代词neither, nor, no more用于后面分句句首，且前面分句必须是否定句，这时后面分句不仅用倒装结构，而且时态(包括助动词)必须和前句一致。so被用作句首的分句前面必须是肯定句。
例：1) She never laughed, nor did she ever lose her temper.
2) The organization had broken no rules but neither had it acted responsibility.
3) John had been working hard and so had his brother.
2. 虚拟结构中的条件从句省去if时， were, had 和should 要移至主语之前。
例:1) Had I known it, I should have told him.
2) Were he to tell us everything, we could try to solve his problem.
3) Had it not been for the reservoir, we had never have been able to beat the drought.
某些条件从句
例：All right, if stay you must, go and sit down properly over there.
3. 句首为否定词和带有否定意义的词或短语作状语或宾语时，常用部分倒装。
常用于这一结构的词语有：
little, nowhere, rarely, scarcely, seldom, few, hardly, never, under no circumstances, on no account, in no way, at no point, at no time, in no sense, at no/other time, by no means, barely/hardly/scarcely … when, not until much/even/still less, no longer, not a single word, not often, 等。
4. only位于句子开头， 如果修饰介词短语或状语从句，那么句子应倒装。
例： Only by shouting at the top of his voice was he able make himself heard.
Only引导的从句位于句首,主语应倒装.
Only when she came home did he learn the news.
5. so / such …that结构中的 so放在句首时， 需要倒装。
例：1) So absurd did he look that everyone stared at him. .
2) Such a good student was she that all the teachers liked her.
6. 在as引导的让步状语从句中形容词、名词或副词常移至从句之首，起强调作用。
例：1) Tired as he was, we decided not to disturb him.
2) Child as the little girl is, she knows several foreign languages.
3) Much as I dislike him, I will help him when he is in trouble.
4) Try as he did, he failed again.
7. 句首为many a time, to such an extent, to such a degree, to such a point 等状语时，句子需要部分倒装。
例： To such a degree was he excited that he couldn’t go to sleep that night.
8. 在某些表示祝愿的句子中使用倒装。
例：1) May you live a long and happy life!
9.介词词组放在句首.
例：In front of the house stands a tree.