为什么是the boys is playing football over there?

A number of boys are playing football over there . A number of boys are playing football over there? look!the boys_(play)over there.为什么是is playing而不是are playing. The children are playing football over there （对are playplayi A number of boys are playing football over there.(改同义句) The girl is playing over there.（就划线部分提问）?划线的是is playing There are some boys playing football.这句子里面为什么用playing?能否分析下句 He is playing football with some_______ boys the are look playing boys football .)(连 The boys playing football are in Cla2. There are 11 boys piaying in a football team为什么用playing 单选 The two boys are playing football.And there's __boy .He i