No. 145 in Bulgarian
кой
"Who"
In a sentence
Кой е новият ти приятел?
Who is your new friend?
'Кой' is used as an interrogative pronoun asking to identify a person.
Интересувам се кой е звънял на вратата.
I'm interested in who rang the doorbell.
'Кой' acts as an embedded question within the sentence.
Не знам кой ключ отклюва тази стая.
I don't know which key unlocks this room.
'Кой' is used to determine or specify an unknown object among others.
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