1.一些表示频率的副词(如many a time, often等)位于句首时 ，句子部分倒装。
Often did we go for walks together.
Many a time have I told him about it.
2.用于“no sooner…than…, hardly…when…和not until等结构中”
No sooner had he arrived than someone called him.他一到就有人给他打电话
3.用于省略if的虚拟条件状语从句(把were, had, should放在主语前构成倒装)
Were I you ( = If I were you ), I would not accept his present.
Had you ( = If you had ) studied hard, you might have passed the exam this time.
4. 用于“形容词/名词/动词+as (though)”引导的让步状语从句，例如：
形容词：Pretty as she is(=As pretty as she is=though she is pretty), she is not clever at all.
动词：Try as he could, he might fail again.
名词：Child as he was, he had to sell newspapers in the streets.
5. 否定副词(never, not…, seldom, hardly, neither, nor, scarcely, rarely, no longer, barely, little)
Barely did he have time to catch the bus.
Never have I been to Beijing.
6. So / Such 引导的倒装句
So kind is she that she deserves all my respect.(全倒装)
So loudly did he speak that everyone could hear him.
7. Only在句首强调状语Only when the meeting is over can we know the decision.