Abstract
The subject of the article is the absence of an aspect category, expressing main ideas of sentence propositions in the morphology of the Kazakh language and the conceptual confusion of the aspect category with tense category in the Kazakh language, which create certain difficulties not only in learning of the Kazakh language but also making correct translation from Kazakh into other languages or vice versa. It has no official title, fixed in academic dictionaries, in spite of having objective content plans and expression plans in the Kazakh language. There are different opinions about the aspect category in the Kazakh language, some linguists consider, that there is the aspect category in the Kazakh language, others deny it. The result is the aspect category has not been presented in the morphology of the Kazakh verbs. The article is devoted to analyzing the objective prerequisites creating the aspect category in languages, including the Kazakh language and reasons of appearing of subjective negations of the aspect category in this language.