请问是on the playground还是in the playground

请问是on the playground还是in the playground 请问：在操场上 英文 是 on the playground 还是 in the playground 为什么? in the playground 还是on the playground? on the playground in the playground They played football on the playground.划线部分是on the playground I found him on the playground.on the playground是宾语补足语,还是地点状语? 在操场上的英文是On the playground.还是In the playground. 是on the playground 还是 in the palyground They usually play velleyball on the playground after class对划线部分提问划线是on the playground after class in the playground 和on the playground 有什么区别? running on the playground为什么是on in the playground 还是on the playgrand The students played basketball on the playground yesterday.如何强调played是It was playing that the students did on the playground yesterday还是 The students did play basketball on the playground yesterday. like,on,is,there,a,of,left,the,playground,the对不起，发错了，是lake,on,is,there,a,of,left,the,playground,the they on are games playing playground the 1、They often_______(play)on the playground Look!He ___(run) on the playground. He____(not run)on the playground now.