There is (der is) (hay) = se usa para expresar que algo o alguien existe (singular).
There are (der ar) = se usa para expresar que muchas cosas o personas existen (plural).
Ex:
There is a chair in the classroom.      
    (der is a che..r in de clasrum)
(hay una silla en el salón de clases)            
 
There are 20 persons there
  (der ar  20  persons der).
    (hay  20 personas allí)

"there is" and "there are" se derivan de "there be (der bi) (haber "de existir")". 

+) there is a table in your house.
--) there isnot a table in your house.
?)  Is there a table in your house?.
+) there are 10 students in the class.
--) there aren´t 10 students in the class.
?)  Are there 10 students in the class?.

Cuando "there be" se combina o se fusiona con "going to be", forman la siguiente expresión:

There is going to be (der is gouing tu bi) (va a haber...) = singular.
There are going to be (der ar gouing tu bi) (va a haber...) = plural.
Ex:  
there is going to be an action movie on the cinema.
 (der is gouing tu bi an acshion muvi on de cinema)     
  (va a haber una película de acción en el cinema)

there are going to be 10 students in this class.
 (der ar gouing tu bi 10 students in dis clas)
   (va a haber 10 estudiantes en esta clase)

Practica de inglés básico 2, unidad 3, possessives.

Complete the following dialogue:

1) Hello!, What is _________(tu) name?.
2) __________(mi) name is _______________.
1) Are you and _________(tus) parents from mexico?.
2) Yes, they _______ (son) from mexico.
1) Are _________(tus) friends from Veracruz city?.
2) No, they _________(no son).

Complete these sentences:

_________(sus) names are ____________________________.
Is ________(tu) name mary?.             Is _______(su) name Fred?.
Are _______(nuestras) houses nice and expensive?.
_________(son) Angel and Susan _______(sus) names?.
I want you to be ______(mi) friend.
This english course is _____(de) Omar Ali Caldela.
My parents´ house ____(es) very nice.
Monica is going to kiss ________(su) boyfriend.
_______(son) these _______(tus) friends?.      
_______(hay) a nice town near here.
_______(hay) many pets around here.