keep healthy,keep为什么可以改stay?

keep healthy,keep为什么可以改stay? keep healthy 为什么不用health? keep you healthy 还是keep you to be healthy 为什么? keep health还是keep healthy 保持健康是keep healthy,keep+adj.,为什么保持平衡又是keep balance,keep+n.为什么不用keep balanced? keep us healthy后面为什么用healthy还有us to keep healthy help sb to keep healthy 还是help sb keep healthy?为什么? keep our health 还是keep our healthy keep fit和keep healthy区别? 到底应该是keep health还是keep healthy呢?如果是keep health又哪来的keep healthy这种说法?如果是keep healthy那为什么我在“知道”里看到How to keep health?这种句子呢? keep fit =keep healthy还是=keep beautifui keep是动词,为什么后面加形容词healthy 形容词不能修饰动词 那么为什么keep healthy成立呢 为什么要把keep和healthy连在一起用 作文HOW TO KEEP HEALTHY 初二英语作文keep healthy keep in healthy还是health?