There is is used for singular or non countable nouns:
there is a car in the street - hay un coche en la calle
There are is used for plural nouns.
There are some cars in the street - Hay algunos coches en la calle
there is a car in the street - hay un coche en la calle
There are is used for plural nouns.
There are some cars in the street - Hay algunos coches en la calle
Here you have some exercises to practise:************************************************************************************************