In his enthusiasm for the project, he went overboard and exhausted all the resources.

went 是动词 go 的过去式，表示"去、进行"的动作。 overboard 由 over（超过）和 board（船板）组成，原意是"从船上掉入水中"，引申为"过度、过分"的意思。 went overboard 是一个固定短语，表示"做得太过火、行为过度"。