When school students study the section ""Morphology"" at Russian lessons, they learn that there are two main groups of parts of speech. Children learn to distinguish independent parts of speech from office, get acquainted with their signs and also their function in syntactic designs (offers and phrases).
Practically all parts of speech are either independent, or office. And only interjections (ah, oh, fathers, etc.) form separate group of parts of speech. Independent parts of speech have some certain value. Verbs, for example, designate action or a condition of a subject, and nouns - directly subject. Numerals can designate or quantity of objects (five, hundred), or an order of objects at the account (fifth, 100-th). Pronouns are necessary to point out regarding (I, me) or its sign (my, your). Adverbs will be required to you if there is a need to specify where when and as any action takes place (far, yesterday, it is good). Participles designate sign, as well as adjectives (kind, beautiful), but what is shown as a result of any action (carried away, collected). Office parts of speech have no certain value. They only serve in order that connect words in a phrase (pretexts) or homogeneous parts of the sentence and also simple sentences as a part of difficult (unions). Nouns, adjectives, verbs, pronouns, numerals, participles, adverbs, adverbial participles belong to independent parts of speech. However some linguists carry an adverbial participle to a special form of a verb. To independent parts of speech it is possible to raise any question. For example, numerals answer the questions ""What?"", ""What?" ", " "What?" ", " "What?" ", " "How many?"". Pretexts, the unions and particles belong to auxiliary parts of speech. They do not answer any questions. It is important to know also that the unions are divided into coordinating and subordinative. And if coordinative conjunctions can connect not only simple sentences in difficult (complex), but also homogeneous parts, then subordinative - are used only in complex sentences and in comparative turns. Particles serve for formation of forms of a word, for example, of an inclination at verbs (let, would let and, give) or to include some certain value in the offer (denial, a statement, specification, etc.). They are called form-building or semantic (modal) respectively. Pretexts can belong or to primordially office (at, for, over, under, etc.), or to derivatives (during, throughout, in view of, etc.). Derivative pretexts came from auxiliary parts of speech by losing of functions of independent parts of speech by them. Independent parts of speech are sentence parts (subjects, a predicate, definition, a circumstance or addition). And here auxiliary parts of speech are not (without independent) sentence parts.