Put together: [to kreˈvati mu ˈine eˈðo].
Greek writes one stress accent per stressed word:
είναι is the 3rd person singular (and also 3rd person plural) of είμαι “to be.”
Τα κρεβάτια μου είναι εδώ.
Notes: plural article τα, plural noun κρεβάτια (regular -ι → -ια), and the verb remains είναι for both singular “is” and plural “are” in Greek.
Use the same word order and change the punctuation to the Greek question mark (which looks like a semicolon):
Το κρεβάτι μου είναι εδώ;
You can also front the adverb: Είναι εδώ το κρεβάτι μου;
Yes: Το κρεβάτι μου βρίσκεται εδώ.
βρίσκεται = “is located/located itself,” a touch more formal or specific to location.
The default is before the noun, with the article at the start and the possessive after the noun: