Поставьте следующие предложения в отрицательную и вопросительную формы. 1.there is a large table in my room. 2.there are three windows in my classroom. 3.there is a table and four chairs in my sister's room. 4.there is a blackboard, four tables and five chairs in our classroom. 5.there is a text-book and two exercise-books on my table. 6.there are very many children in the park yesterday.

 1.There isn't a large table in my room. 1.Is there  a large table in my room?. 

2.There aren't three windows in my classroom. 2.Are there  three windows in your classroom?

 3.There is a table and four chairs in my sister's room. 3 Is there  a table and four chairs in your sister's room? 
4.There isn't a blackboard, four tables and five chairs in our classroom.4.Is there  a blackboard, four tables and five chairs in our classroom?
5.There isn't a text-book and two exercise-books on my table.5.Is there  a text-book and two exercise-books on your table?  
6.There aren't very many children in the park yesterday.6.Are there very many children in the park yesterday?