英语句子，有些否定意义的介词短语置于句首，不引起倒装，例如：in no time（立即；很快 = very fast），for no reason（无缘无故；莫名其妙）

The guards, he said, would punch them for no reason
他说警卫会无缘无故殴打他们。
《柯林斯高阶英汉双解学习词典》
For no reason at all the two men started to laugh.
两个人莫名其妙地开始大笑。
《柯林斯高阶英汉双解学习词典》

In no time supper will be ready. 很快，晚饭就好了。