1.我有一个用来玩的足球。2.我有一个可以玩的手机。
1.I have a football to play with.
2.I have a phone to play with.
1. I have a football to play with.
2. I have a phone to play with.
我觉得，这两个句子都可以说。
play with sb. 表示“与某人一块玩”，把人作为玩的伙伴。
play with sth. 表示“玩弄某物”，把物作为玩的对象。词典：play with sth. 玩弄某物 ; 以某物自娱
注：至于如何玩那是方法问题。play with a football 可能不是扔来扔去，有不少玩的方法。同理，play with a phone，也是这样。这里有一个例句：
When at home, if he spots any mistakes in John's homework, he will ask John to correct them immediately. What's more, he forbids John to play with a cellphone.
在家时，假如他发现约翰作业中有错误，就需要他立即改正，并禁止约翰玩手机。
更多搭配和词组：
play with fire
play with a knife
play with a cat
play with matches
