playing后面加什么词

playing后面加介词，名词；

playing

n.(演奏等的)表现，风格;(乐曲)演奏；

v.玩耍;游戏;玩乐;(为玩耍)假装，假扮;捉弄;戏弄；

play的现在分词

The children were playing in the sand.

孩子们正在玩沙子。

Germany is playing a leading role on the international stage.

德国在国际政治舞台上起着主导作用。

The playing area was marked off with a white line.

运动场地用白线划了出来。

A high wall separated our back yard from the playing field.

我们的后院和运动场之间隔着一堵高墙。

The kids were playing on waste ground near the school.

孩子们在学校附近的荒地玩耍。

What do you think you are playing at?