先是

先是 is an adverb meaning 'firstly' or 'at first', used to introduce the initial event or situation in a sequence of actions or developments.

The character 先 (xiān) means 'before' or 'first', and 是 (shì) functions as a linking verb, similar to 'is' in English. Together, 先是 conveys the idea of something happening initially or before other events.

It is commonly used in spoken and written Chinese to structure narratives, explain processes, or describe cause-and-effect relationships. It helps organize thoughts in a logical order and is especially useful in storytelling or reporting events chronologically.