1.There is a desk in my bedroom.
2.There are posters on the wall.
3.There is a bed in ny room.
4.There are three windows in my room.
5.There is a wardrobe in my bedroom.
6.There is a carpet on the floor.
7.There are four chairs in my room.
8.There is a bookcase in my room.
There is - пишется с существительными в единственном числе.
There are - пишется с существительными во множественнлм числе