I have a ball. Let's play.
我有一个球。我们一起玩吧。
I have many balls. They're in that box.
我有很多球。它们在那个盒子里。
How many balls do you have?
你有多少球?
I have twelve balls.
我有12个。
Can you play table tennis?
你会打乒乓球吗?
No, but I can do this.
不会,但是我会做这个。