lost oneslf和drown oneself以及set one's mind的区别

lost那个是指沉迷于什么,D那个是全身心投入到工作学习等,S那个是下决心.例子he lost himself in the pc games.she draws herself in her homework.i set my mind to watch tv.妈呀累死了,我用手机打的,加分～～