在操场上用英语表达为in the playground/on the playground，介词既可以用in，也可以用on。介词中除了in、on可以与操场搭配外，at the playground也可以表示“在操场上”
他们在操场上打了起来。
They came to blows on the playground.
教室里没有学生。他们在操场上跑步。
There are no students in the classroom.They are running in the playground.
那天晚些时候，梅雷迪思在操场上看到了乔西，于是跑过去和她说话。
Later that day, Meredith found Josie on the playground and ran over to talk to her.
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