keep up 、keep on 、keep out 、keep from的区别、和例句

问题描述:

keep up 、keep on 、keep out 、keep from的区别、和例句

keep up v.不低落,维持,继续vt.继续,不低落,跟上步伐;不为(疾病等)所屈n.保持不落 shy:I always keep up my smile whoever I meet.keep on v.继续,穿着...不脱vt.继续进行,接连,反复,坚持下去n.继续进行,继续雇用(...