play 是名词,及物动词,和不及物动词
作为动词,play 有两个用法：
play with sth.比如 play with a ball
play sth.比如 play computer games ,play hide and seek,play ball
我们说
The cat is playing with a ball
我们也说
We didn't play ball yesterday
另外,play ball 作为俗语,也有“合作”,“帮忙”之意,例句
You won't play ball with me,I won't play ball with you.a catplay a ball不是acat play with a ball 对吗如果ball 前面 有冠词 aplay 要接 介词 with ， 即 play with a ball A cat plays with a ball A cat plays with 2 balls 等等。