1、eep on +doing:Let's keep on doing our work after an hour's rest.
2、keep on +n:Ifyoukeeponcollection,intimeyou'llhaveawealthofdata.
3、keep on with +n./ pron.(名词/代词)继续:Let's keep on with our work after an hour's rest.
4、keep on +从句：Keep on until you get to the church.