Yatak odasında bir battaniye var.

There is a blanket in the bedroom.

Breakdown of Yatak odasında bir battaniye var.

• bir: a
• var: to exist
• -de: in
• yatak odası: the bedroom
• battaniye: the blanket

Questions & Answers about Yatak odasında bir battaniye var.

How is yatak odası formed, and what role does the suffix -sı play?

yatak = bed, oda = room. When combining two nouns into a compound, Turkish adds a third-person possessive suffix (here -sı) on the second noun: oda → odası. So yatak odası literally means “bed’s room”, i.e. bedroom.

Why do we add -nda to odası to get odasında?

The locative case -da/-de marks in/at. Since odası ends in a vowel, we insert a buffer consonant n, yielding -nda. Vowel harmony with the preceding vowel ı (a back vowel) requires da, so:
oda + sı + n + da = odasında (“in the bedroom”).

What is the function of bir before battaniye, and is it mandatory?

bir is the indefinite article a/an. In existential sentences with var, you can:

• include bir to stress one single item: bir battaniye (“a blanket”)
• omit bir for a more general statement: battaniye var (“there is blanket”/“there is a blanket”)
  Both forms are correct; using bir simply emphasizes one.

How does the verb var work in this context?

var is an existential verb meaning there is/are. It has no personal endings in this use—implicitly third-person present. To assert existence, you simply say bir battaniye var (“there is a blanket”).

How do you make this sentence negative?

Use the negative existential yok instead of var:
Yatak odasında bir battaniye yok.
= “There isn’t a blanket in the bedroom.”

How do you turn this into a yes/no question?

Add the question particle -mı (with vowel harmony) after var:
Yatak odasında bir battaniye var mı?
= “Is there a blanket in the bedroom?”

Is the word order fixed, or can it change?

Turkish word order is flexible, but existential sentences typically follow:
[Location] [Item] [Existential verb]
Putting the location first sets the scene. You could say Bir battaniye yatak odasında var, but it sounds less natural and shifts the emphasis to the blanket rather than the location.