learn to do中的to do是宾语还是状语

是状语。
learn to do是学着去做某事（在心里打算好了自准备去学，还没有去）强调具体某次的动作。
learn，英语单词，及物动词、不及物动词，作及物动词时意为“学习；得知；认识到"，作不及物动词时意为“学习；获悉”。

扩展阅读：xbox series x ... lead sb to do sth ... learn to sb ... lets make a puppet ... lead to do 还是doing ... learn to do和doing区别 ... lets sb do 还是 to do ... led sb to doing ... learn with ...