Is again a connective

Yes, "again" can function as a connective in certain contexts. It is often used to link ideas or reiterate a point, emphasizing repetition or a return to a previous thought. For example, in a sentence like "She decided to try again, and again, she succeeded," "again" connects the two instances of success. However, its primary role is as an adverb rather than a traditional connective like "and" or "but."