我看到他们正在操场上踢足球的翻译：I've seen them play football on the playground 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I see they're playing football on the playground

I've seen them play football on the playground

I saw in their drill ground is playing the soccer

I see that they are at the playground outside football

I've seen them play football on the playground