the boys are runing on the playground 还是the boys run on the playground the boys are running in the pl...
the boys are playing on the playground\u5f88\u9ad8\u5174\u4e3a\u60a8\u89e3\u7b54!
\u53e5\u5b50\u4e2d\u6ca1\u6709\u5212\u7ebf\u90e8\u5206
1\u5047\u5982\u5212\u7ebf\u90e8\u5206\u662f\uff1aplaying football
\u63d0\u95ee\uff1awhat are the boys doing on the playground
\u7ffb\u8bd1\uff1a\u7537\u5b69\u4eec\u6b63\u5728\u64cd\u573a\u4e0a\u505a\u4ec0\u4e48\u5462?
2.\u5047\u5982\u5212\u7ebf\u90e8\u5206\u662f\uff1aon the playground
\u63d0\u95ee\uff1awhere are the boys playing football?
\u7ffb\u8bd1\uff1a\u7537\u5b69\u4eec\u6b63\u5728\u54ea\u91cc\u8e22\u8db3\u7403?
\u5e0c\u671b\u53ef\u4ee5\u5e2e\u5230\u60a8,
Are the boys running in the playground
\u6709BE\u52a8\u8bcd\u7684\u53e5\u5b50\u53d8\u4e00\u822c\u7591\u95ee\u53e5\u8981\u628aBE\u52a8\u8bcd\u63d0\u524d
The boys are running on the playground.
男孩子正在操场上跑步。
现在进行时结构是 be加动词ing形式，表示现在正在进行或发生的动作。
run 是重读闭音节词且只有一个辅音字母，双写辅音字母再加ing,即running
The boys run on the playground.
一般现在时态，表示经常性习惯性发生的动作，常与sometimes, often ,usually,always,never,seldom等连用
主语是复数行为动词作谓语要用原形
扩展阅读：boys be r10 ... the one you love ... take me to your heart ... the blend 117 ... you are my sunshine ... do you understand ... i am you kim taylor ... we are young ... shape of you ...
