Verbs in an uncertain form and in the third party of the only thing and plural are said equally. How to define what of such words — a verb in an uncertain form? And it is important to make it to write a word without spelling error. It is nfr; t is necessary correctly to execute syntactic and morphological analysis of a word.
Instruction
1. It is possible to determine an infinitive by a question. Find a verb and ask to it a question. If it is a verb in an uncertain form, then he will answer the question "what to do?", "what to make?". For example, to throw, grow, furnace, flood, dissolve, lay down. On the end of such verbs the soft sign is always written.
2. It is necessary to distinguish an infinitive from verbs in a personal form, especially if there is a returnable suffix "-sya", "-s". For this purpose ask a question to a word. If the verb answers the question "what to do?", "what to make?", it is an uncertain form. And if on the question "what does?", "what makes?" - the third party of singular. This task (what does?) decides simply. - On this act (what to make?) to decide not easy.
3. Look at writing of this word. If the word is written with the soft sign (-tsya), then it is an infinitive. And if without soft sign, then it is a verb in the third party of the only thing or plural.
4. It is difficult to distinguish an infinitive from a personal form if the word is written down in a transcription. Record finaly these forms coincide: [uch'itsa] (learns) - (to study) [uch'itsa]. In that case pay attention to an accent, a vowel before [-tsa] or a context where it is possible to ask a question. If this work is impracticable, then both forms are appropriate here.
5. The uncertain form of a verb enters a compound personalized predicate. In that case in the offer there are two non-uniform verbs. To define, an infinitive, what of them, it is necessary to designate a grammatical basis. The predicate will consist of two verbs. In what the lexical meaning consists - an infinitive, it is necessary to write the soft sign in it. So, in the offer "Pupils will be able to work in addition" a predicate "will be able to work". And the uncertain form - "to work".
6. The uncertain form of a verb can act as secondary parts of the sentence. It is possible to define it in such cases, following logic of reasonings. Ask a question of an oblique case from a predicate to an infinitive. If it is possible, then in this case it addition. For example, in the offer "The trainer ordered to be engaged to us in warm-up" the word "be engaged" will be addition (ordered what?). In that case argue so: the action designated in a verb "ordered", the trainer carries out, and others will carry out it. It means not a predicate, a simple sentence. The circumstances expressed by an uncertain form of a verb most often answer the questions "for what purpose?", "for what reason?". In the offer "I came to the gym to train" to an infinitive we ask the question "came for what purpose?". To definition ask a question from a noun. In the offer "I perfectly know ability to play the guitar" an infinitive - definition: ability (what?) to play.