我们学校有五十位男教师.
Our school has 50 male teachers
冰箱里面有两瓶牛奶
There are two bottles of milk in the refrigerator.
树上有一个风筝
There is a kite in the tree.
操场上有学生吗?
Are there any students on the playground?
肯定回答
Yes, there are.
否定回答
No, there are not.