Özet:

Word formation in Turkish is conducted through roots and suffixes. Added to the noun and verb roots, suffixes give them typical and functional meanings. The suffixes and structures that help nouns relate to other words in the sentence and gain meaning and relate nouns to nouns, verbs and prepositions are evaluated in “case” concept. The suffix that makes nouns instruments is called instrumental case. This suffix, by relating it to verb, helps noun express instrument and time. Commitative case gives noun to which it is added the meaning of co-occurrence. In modern Turkic dialects, both cases are made with the same suffix or word. With structures "birlen, bile, ile, menen" both cases are made. Yakut Turkish is similar to Old Turkish in the cases. The commitative case and the instrumental case are made with two different structures. For the commitative case the suffix +LIIn is used in Yakut Turkish. This suffix gives the meaning of co-occurrence As to Yakut Turkish in terms of instrumental case, we see "+n", the old instrumental suffix, in adverbs and times. The Yakut Turkish version of this suffix is +(I)nAn and it gives the meaning of instrument to the word it is added. The commitative and instrumental suffix in Yakut Turkish exists as one same suffix.

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