on the playground in the playground

in the playground 还是on the playground? on the playground in the playground 请问是on the playground还是in the playground in the playground 和on the playground 有什么区别? in the playground 还是on the playgrand 是on the playground 还是 in the palyground in the playground 和on the playground 有什么区别?分别该什么时候用? 请问：在操场上 英文 是 on the playground 还是 in the playground 为什么? in the playground 和on the playground 有什么区别吗? on the playground 与 in the playground 为什么都有出现 在操场上用英语说是on the playground,还是in the playground这个? 在操场上的英文是On the playground.还是In the playground. We played on the playground happily.(改为同义句)We played on the playground happily.(改为同义句)We ＿ fun ＿ in the playground. All the pupils are on the playground now.All the pupils are in the playground now.那个介词对? They often play basketball in the playground on Sundays.（对划线部分提问）划线部分为:in the playground on the playground与in the playground哪个正确、哪个普遍呢要绝对准确的答案 The children in class 2 are running on the playground.in class 2划线提问 小学英语书上He is in the playground小学英语阅读书上We often kick the ball on the playground到底用in 还是on