keep at与 keep on与 keep up如何区别
问题描述:
keep at与 keep on与 keep up如何区别
答
keep at坚持,坚持做下去;纠缠,坚持,使不停地做
keep on继续;穿着…不脱,继续进行,继续不断
keep up保持;继续;不低落;不落后