If you----on taking this attitude,we will have to ask you to

insist on 坚持某事
persist in 固执于
keep on 继续
insist on坚决要求,坚持认为；stick to坚持做某事；to是介词,后面接动词的ing形式,insist on当坚决要求时,后面的从句用虚拟语气；insist on当坚持认为时,后面用陈述句语气.persist in :坚持行动,有时表示固执己见或坚持不改