There is / There are

AFFIRMATIVE SENTENCES

Use "There is" for singular nouns and things you cannot count.                      

There is a ghost in this room....         

There is an apple on the desk.                       

 There is some oil in the pavement.

Use "There are" for plural nouns; that is to say, we use

there are with a plural subject.

There are 600 students in this school

There are four windows in my room            

There are some windows in my room

 NEGATIVE SENTENCES

           

To say the opposite, (the negative form of this structure),

use isn't  (is + not)    or    aren't   (are + not)

                           

There isn't a balcony  

 There isn`t an orange on the table               

There isn't ice on the lake                 

There aren't chairs in this room.        

INTERROGATIVE SENTENCES

As almost always happens in English, to make questions with this structure

change the order of the sentence at the beginning.

                         

 Is there a balcony in the flat?                      

 Is there a Post Office near hear?                 

 Are there two telephone lines?                    

 Is there any sugar in the sugar pot? 

Are there any glasses in the cupboard?        

 Are there any chairs in your room?              

Practice links:

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-63198.php
http://www.english-zone.com/verbs/thereisare1.html
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-8958.php