runner eats well.这个单数名词前为什么没有有冠词.runner 是不是表示一种身份?

runner eats well.这个单数名词前为什么没有有冠词.runner 是不是表示一种身份? Runner eats well还是Runner eats well runner eats well Runner eats well! Runner eats well.这句话是否正确?runner是否需要带上冠词 Runner eats well!怎么读? runner eats They are running stars.（为什么runner＋ing,这里没有动词呀） Runner eats w Runner eats well.变一般疑问句. Runner eats well全文其翻译 急救runner eats well作文一篇 Runnner eats well .Runner eats well .怎样翻译