(1) keep out = remain outside意为“留在外面”或= prevent... from entering 意为“不让……入内”。例如：[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ {=Z$EVHTeD|(9]FroG]

    Keep out! Can't you read the sign on the door? 别进去！难道你看不见门上的牌子吗？[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 0vF'd !yj$c{Jr"*=FroG]

    We should keep the enemy out of our country. 我们应御敌人于国门之外。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ]l}"+KQK4*zj FroG]

    (2) keep away意为“不接近；离开；避开等”，away是副词，其后通常与from搭配使用。例如：[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ \,S96 #6u#PA=8uCFroG]

    Keep away from the fire! 勿靠近火炉！[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 1g0n_#I\ aw4zJ+mo-]FroG]

    (3) keep off意为“不接近；使离开”，off既可用作介词，也可用作副词。例如：[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ij lN#H%~dd3OsQ6'GFroG]

    Animals were afraid of fire, so they made a big fire to keep wild animals off (= keep off wild animals). 动物怕火， 因此他们生起了一堆大火以防野兽接近。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ?IqWfnReFOEl3CdIu=FroG]