Subordinate composite sentences with -ki and correlative words

In some subordinate composite sentences two pronouns work as a pair: an interrogative pronoun (kim, nima, qancha, qanday, qayer) in the subordinate clause and a pronoun “answering” it (u, shu, o‘sha, shuncha, shunday) in the main clause. Such paired words are called correlative words: if one is present, the other is needed too. The predicate of the subordinate clause usually has the -sa form. According to the function of the correlated pronoun in the main clause, the subordinate clause belongs to the matching kind: subject – subject clause, object – object clause, adverbial – adverbial clause. For example: “Kim mehnat qilsa, o‘sha rohat topadi” (subject); “Nimani ekkan bo‘lsang, shuni o‘rasan” (object); “Qayerda tozalik bo‘lsa, o‘sha yerda sog‘lik bo‘ladi” (adverbial). The subordinate clause is separated by a comma.