keep up:
保持,继续,维持
例句与用法:
1. The enemy kept up their bombardment day and night.
敌军一直日夜不停地狂轰滥炸。
keep on:
vt. 继续进行(接连,反复,继续)
例句与用法:
1. Keep on past the church; the stadium is about half a mile further on.
一直向前走过了教堂,约莫半英里就是体育场。
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keep on 继续下去
和
keep up =跟上
keep on doing
keep up 可以作为不及物动词短语
keep up sth
很高兴为你解答!
老师祝你学习进步!
望采纳,多谢你的问题!^_^