为什么玩球要写成play with the ball而不能写成play ball 为什么加with?我知道表示玩球类运动

"play with" 固定塔配:1。The children are playing with toys。2。These bottlenosed dolphins played with a few balls after the show3。有时还可以写成:A dolphin at the Mirage in Vegas playing ball with himself。4。或:Video of girl playing ball with dolphins。5。可以写成:play hockey; play badminton; play chess; play cowboy 演牛仔。