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6.16.2. Category of Tense

The category of Tense shows the time of the action or state expressed by the verb. It is manifested in the 3 categorial forms: present, past and future.

The present tense form shows that the action is ; simultaneous with the moment of speaking. For example: He lives in London. She is doing her homework. She has already gone home. It has been snowing for two days.

The past tense form indicates that the action precedes the moment of speaking: He lived in London all his life. She was doing her homework when I visited her. She had already gone home when I rang her up. The train was pulled up by the heavy snowfall: it had been snowing for two days.

The future tense form shows that the action follows the moment of speaking. For example: He leaves for Eng­land, and will stay in London. She is busy tomorrow, she'll be doing her homework. If it snows today we'll go skiing tomorrow.

The category of Tense can also be manifested by the two forms of the participle, namely the present par­ticiple and past participle. For example: doing done, walking walked, singing sung, shouting shouted.

But in general, like the category of Mood, the category of Tense is expressed by the predicative verb. It

is always associated with the category of Mood and the categories of Taxis, Aspect and Voice and forms with them the system of 11 grammatical tenses. (See 6.16.1.)

6.16.3. Category of Taxis

The category of Taxis (категория временной отне­сенности) shows an action or state as related to another action or state. It is constituted by the correlation of perfect and non-perfect forms. Perfect forms express ante­riority and therefore finality, result or completion of ac­tion, while non-perfect forms render the idea of simul­taneity, incompletion of action.

The category of Taxis may be either connected or disconnected with the category or Tense. If the category of Taxis is related to the category of Tense, it manifests itself by the opposition of the perfect and non-perfect tenses. The perfect tenses are: the Present Perfect, the Past Perfect, the Future Perfect, the Present Perfect Conti­nuous, and the Past Perfect Continuous. The non-perfect tenses are the Present, Past, and Future Simple, the Present, Past, and Future Continuous.

The marked members of the opposition are perfect tenses which are expressed by the auxiliary have and the past participle of a meaningful verb.

The perfect tenses show an action as anterior or precedent to another action in the utterance. For examp­le: When we came to the theatre the performance had al-ready started. Our friends told us that they had been waiting for us for half an hour.

In the case of the Present and Future Perfect tenses the verbal forms show a period of time up to and

including the present and the future correspondingly: He has finished the work. We shall have finished the work by tomorrow.

The non-perfect tenses indicate that all the actions of the utterance are simultaneous or take place one after another: We came to the theatre and the performance started. My friends say they always have to wait for me long.

When the category of Taxis is taken separately, without any relation to the category of Tense, it is re­vealed by the opposition of perfect and non-perfect non-finite forms, i.e. present participle, gerund and infinitive. The strong members of the opposition are perfect forms which are represented by means of the auxiliary have and the form equivalent to past participle of a meaningful verb. Compare: reading, being read (non-perfect forms of the present participle/gerund) — having read, having been read (perfect forms of the present participle/gerund); to read, to be read, to be reading (non-perfect infinitives) — to have read, to have been read, to have been reading (perfect infinitives). (For details see 6.77.)

Non-finite perfect forms denote actions as precedent to the action expressed by the predicative verb while non-perfect non-finite forms indicate actions as simultaneous to the action expressed by the predicative verb. For example: Having read the book in two days the boy gave it back to the library. — While reading an English book in the original he had to consult the dictionary. He seems to read a lot. He seems to have read the book.

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