1、意思不同。
(1)keep up 意为“保持,跟上,不减弱…”。
例句:He lengthened his stride to keep up with her.(他迈大步追上她。)
(2)keep on 意为"坚持,继续…"。
例句:If so, then keep on doing whatever it is that you’re doing. 如果真的是这样,那么就继续做你现在做的一切——不管是什么继续下去。
2、用法不同。
(1)keep up不可以直接加动词表保持做某事,可将其视为不及物动词短语,常用于"keep up with…"或"keep …up"。
例句:The two saleswomen were busily trying to keep up with the demand.(那两名女售货员正忙着接待顾客。)
(2)keep on一般使用"keep on +doing /sth.","keep on at…"或"keep…on",多种用法。
例句:Her coach encouraged her throughout the marathon race to keep on running. 她的教练在马拉松赛全程鼓励她继续不断奔跑。
扩展资料:
keep vt.保持;保留;遵守;阻止vi.(食品)保持新;保持健康n.保持,保养;供养,抚养;生活,生计;饲料;牧草
keep短语:
1、keep down 控制;使不升起;使留级;吞下药物
例句1:The prime aim is to keep inflation down.首要目标是抑制通货膨胀。
例句2:No matter what a woman tries to do to improve her situation, there is some barrier or attitude to keep her down. 女性无论如何努力去改善自己的处境,总会受到一些障碍或看法的压制。
2、keep off 避开,防止,挡住。
例句1:I managed to stick to the diet and keep off sweet foods.我努力做到了只吃规定饮食,不沾甜食。
例句2:The local police had warned visitors to keep off the beach at night. 当地警方告诫游客不要在夜间去海滩。