英语语法中的半倒装结构详解：例句及常见用法

半倒装结构是指在英语语法中，将助动词或情态动词放在主语之前，谓语动词放在主语之后的结构，常用于强调语气或疑问句中。

常见的半倒装结构有：

1. Hardly/scarcely + had + 主语 + 过去分词，when + 主语 + 谓语动词

例句：Hardly had I arrived at the airport when my flight was cancelled.

2. Not only + 副词/形容词 + 主语 + 谓语动词，but also + (副词/形容词)

例句：Not only did he finish the project on time, but also he did an excellent job.

3. Seldom/rarely + does + 主语 + 谓语动词

例句：Seldom does he miss a deadline for his work.

4. Never + have/has/had + 主语 + 谓语动词

例句：Never have I seen such a beautiful sunset.

5. Only + 动词/形容词 + 主语 + 谓语动词

例句：Only by working hard can you achieve success.

6. So + 形容词/副词 + 主语 + 谓语动词

例句：So beautiful was the scenery that I couldn't take my eyes off it.

7. Here/there + be + 主语 + 谓语动词

例句：Here comes the bus.