In English, to affirm the existence of something, we can use there is or there are.
We use there is when the following name is singular. In the negative form, we use there isn’t. In the interrogative form, we use “is there…? : There is a sofa in the living room ; The is a man behind the door There is a bag in the car.
We use there are when the following name is plural. In the negative form, we use “there aren’t”. In the interrogative form, we use “are there…? : There are two women working here; There are fish in the water ; There are many newborns in the hospital.
