There is/are x Have/Has

Although in Portuguese these two forms mean the same thing, "ter", there is a slight difference between them.

When you are talking about something that simply exists, without attributing property, you should use there is/are.

Ex: There are some people in the room. (these people don't belong to the room, they're just in there)

There is a boy playing in the park. (the boy is not a property, he is just using the space)

When you are talking about things that have a relation with each other, you should use have/has.

The park has a guard. (although the guard is not a property, he has a relation with the park)

The house has four bedrooms. (Not only am I describing the house, I am telling you about its features)

Was it clear? :))