重要-为什么用have I :only on one occasion have I ever felt frightened.
在“only on one occasion have I ever felt frightened”这个从句中，主语“I”和助动词“have”的位置之所以颠倒（不是正常的“I have”），是因为句首的“Only on one occasion”这个状语短语
occasion
China will soon hold global summit of women in Beijing on occasion of 30th anniversary of 1995 World
BEIJING, Sept. 22 (Xinhua) -- China will soon hold the global summit of women in Beijing on occasion of the 30th anniversary of th