How many girls do you have in your class?
你们班有多少个女生
We have nineteen girls.
我们有十九个女生
We have twenty boys in our class.
我们班有二十个男生
How many classes do you have this afternoon? Two or three?
今天下午你有几节课 两节还是三节
I have only two.
我只有两节课
Great! Let's go and play after class.
太好了 下课后我们去玩吧