为什么keep healthy中的keep不加副词,到底什么时候动词加副词或形容词呀,要求说明加例子,

eat a balanced diet to stay healthy中的 stay healthy能不能替用keep healthy,不能的话,是为什么 keep healthy 为什么不用health? keep healthy,keep为什么可以改stay? keep you healthy 还是keep you to be healthy 为什么? 为什么keep healthy中的keep不加副词,到底什么时候动词加副词或形容词呀,要求说明加例子, keep us healthy后面为什么用healthy还有us help sb to keep healthy 还是help sb keep healthy?为什么? 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 keep health还是keep healthy 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? I think eating more healthy food can help you keep ()填health 还是healthy?为什么? what should i do,doctor?A.to keep healthy B.keeping healthy 为什么不选B is the best way （to） keep healthy中healthy为什么前面要加to to keep healthy 为什么保持平衡是keep healthy,保持平衡却是keep balance,healthy是形容词,balance是名词如题