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(某人)
shy: I always keep on smiling whoever I meet.
***虽然keep on 和keep up都可作“继续”解，但是，keep on之后总是跟分词（keep on doing sth.），而keep up之后总是跟名词（keep up sth.）

keep out : 1.把…挡在外边 2.使其等在外面,不让进入 3.不让…进入 4.防治 5.抵御 6.靠外，免入 7，禁止入内

shy: "Keep out! No one is allowed here

keep away from：远离，保持距离 克制 阻止;避开
shy: You keep rabbits away from the fence.

O(∩_∩)O~O(∩_∩)O~