There ... four chairs, there ... carpet, there ... a lamp, there ... a painting, there ... two windows, there ... ten books что надо поставить is, isn't, are, aren't

1) There are four chairs, there are two windows, there are ten books - 4 стула, 2 окна, 10 книг = > глагол to be имеет форму множественного числа - are.

Если глагол в отрицательной форме, то после глагола ставим not (are not = aren't) - there aren't four chairs, here aren't two windows, there aren't ten books.

2) There is a carpet, there is a lamp, there is a painting - 1 ковер, одна лампа, одна картина = > глагол to be имеет форму единственного числа - is.

В отрицательной форме после глагола ставим not (is not = isn't) - There isn't a carpet, there isn't a lamp, there isn't a painting.