Staying healthy这里为什么保持要加ing

Staying healthy这里为什么保持要加ing staying healthy 为什么不是 staying health staying healthy作文 staying healthy为何不是staying healthily 有关staying healthy谚语越多越好1 It is not a healthy habit staying up too late.这个句子为什么用staying up?用了什么语法啊? A healthy does of sunshine may be the secret to staying young.为什么么不是To stay? i may be staying a home.为什么这里stay加ing secret for staying healthy 的中文意思是什么 I want to write something about A.stay healthy B.stay health C.staying healthy D.staying healthilyWHY？ Eating fruit and vegetables is healthy for us .healthy不是形容词吗?为什么用在这里,而不是用名词的healthy.该怎么分啊.. 为何在英语句子,是TO stay healthy ,而不是Staying healthy? I preferred staying at home watching tv on weekends.这里的watching是什么成份,为什么...I preferred staying at home watching tv on weekends.这里的watching是什么成份,为什么要写成ing形式 to You need to have healthy eating habits这里的habit后面为什么要加s the importance of being healthy这里为什么不把being 去掉后面直接加health 英语翻译选项 stay .staying .to staying .to stay为什么 How long are you staying 为什么用are和staying. we are staying here for two days为什么用staying?