请问为什么是keep healthy 动词不是应该用副词修饰吗例如还有look worried

请问为什么是keep healthy 动词不是应该用副词修饰吗例如还有look worried I want to tell you how can keep healthy.为什么是病句 保持健康为什么是keep healthy?健康不应该是名词吗? It is quite important for us to keep healthy.为什么是for不是to? playing sports is the best way to keep healthy 为什么是to keep,又可以得到什么用法 ____healthy,you should take more exercise.请问是to keep healthy 还是keeping healthy keep health还是keep healthy to keep healthy 为保持健康为什么用to keep healthy,不用keep healthy{放于句首}不要说的太复杂 少吃垃圾食品有助于你保持健康 Having （less） junk food （helps）you （keep）（healthy）为什么是helps 还是别的单词 少吃垃圾食品有助于你保持健康 Having （less） junk food （helps）you （keep）（healthy）为什么是helps 还是别的单词 exercising is a good way to keep healthy.为什么是exercising而不是exercise,exercise不是也有名词的意思,干什么要用动名词啊. 请问耳机什么是动铁? 以“keep healthy”为题目写一篇不少于80字的短文 1.why is it inportant to keep healthy?2.what's your experience in keeping healthy? keep healthy=stay healthy吗? keep healthy/stay healthy的中文翻译是什么? keep healthy和stay healthy的区别 How long can I（）this book?Two weeks 选择请问为什么是 keep 而不是 borrow