为什么Playing football.Play要加ing

为什么Playing football.Play要加ing He like playing the football.He likes playing the football.上面两个句子哪个正确,为什么? His hobby is playing football这里play为什么加ing 选哪个?Mike and John (likes like)playing football.为什么? Playing football is difficult.为什么用Play+ing , 反意疑问句 Tom likes playing football,__________?为什么 Many of the boys like playing football.为什么不能说成A lot of the boys like playing football. playing football的中文 she likes go to the movies with her friends and play football还是playing football为什么 Tom likes playing the piano while Tim likes playing football.这里为什么用while the pupils of class three like playing football.(为什么要用like playing?) Do you like playing football 为什么填playing?这一题考察了那个知识点? There are some boys playing football.这句子里面为什么用playing?能否分析下句子成分? I find that playing football is interesting .为什么用playing?不能用Play. I saw them playing football on the playground just now 为什么只能填playing I am（）.playing football playing the football play football he likes playing football 画线部分 football he is playing football .画线部分 football.