如果这个句子是 be +分词 的结构，那就要。如果只是单独的分词或分词短语在句首作插入语，那就不可以倒装。Surprised was I at that time. （这是为了突出 surprised）Surprised, I quickly came to the fact that his success was based on all his failures in the past. （这里 surprised 是“形容词作插入语”，不会倒装）属于主谓完全倒装：即 谓语 + 主语部分主谓倒装是：助动词/情态动词（如do have be may等等）+ 主语 + 动词有时，为了强调 be 后的过去分词或现在分
