倒装句：英语最基本的语序是主语在前，谓语动词在后。但有时由于句子结构的需要或表示强调，就要采用倒装形式。
1.only+状语
Only in this way can the experts and professors make it clear.只有用这种方法专家和教授们才能把事情搞清楚。
2.否定副词开头或含有否定词的介词短语开头
Not until I woke up after I had had a good sleep did my daughter go to bed last night.昨晚直到我香香地睡了一觉醒来我女儿才上床睡觉。
3.so+形容词或副词开头或类似以such开头的
So attentively does Bill study that all the students in our class envy him.比尔学习特认真，我们班所有同学都羡慕。
4.介副词开头的表语或表语从句
The door opened. In came his father.
5.if引导的虚拟条件从句省略if时
If it should rain tomorrow, we should have to put off the visit to next Wednesday.明天下雨，我们只好将参观活动推迟到下个星期三。
6.as作让步状语的特殊结构
Try as I could , I decided to give the chance to others.尽管我可以再试，但我还是决定将这次机会让给他人。
7.so,nor,neither开头表示情况相同
She is Professor Li’ neighbor , so am I. 她是李教授的邻居，我也是。
