there be句型表达的是“在某个地方存在某人、某物等”，have/has则表示“某人拥有某物”。当主语为第三人称单数时，使用has；其他人称作主语，则使用have。在there be句型中，主语是单数，be动词用is；主语是复数，be动词用are。
there be造句
There is a book on the desk.
课桌上有一本书.
How many people are there in the city?
这个城市里有多少人口.
There is a pen and two books on the desk.
课桌上有一个钢笔和两本书.
There are two books and a pen on the desk.
课桌上有两本书和一个钢笔.
There are some students and a teacher in the classroom.
在教室里有一些学生和一位老师.
have造句
I have a new pen.
我有了一支新的钢笔。
That have a lot of money.
他们有很多钱。
Have some apples.
来点苹果吧。
I have already finished my homework.
我已经完成我的作业了。
I have fish for dinner.
晚餐我有鱼吃。