Importance of Computer

Topics: Grammatical tenses, Past tense, Time Pages: 5 (917 words) Published: August 24, 2013
* Time is a universal ,non-linguistic concept with three divisions: * Past
* Present
* Future
* By tense we understand the correspondence between the form of verb and our concept of time. * Time is of three types:
* Past time
* Present time
* Future time
PRESENT
* SIMPLE PRESENT
* PRESENT CONTINOUS
* PRESENT PERFECT
* PRESENT PERFECT CONTINOUS

PAST
* SIMPLE PAST
* PAST CONTINOUS
* PAST PERFECT
* PAST PERFECT CONTINOUS

FUTURE
* SIMPLE FUTURE
* FUTURE CONTINOUS
* FUTURE PERFECT
* FUTURE PERFECT CONTINOUS

USES OF TENSES
I. SIMPLE PRESENT
II. Form 
III. Sentences
  I / You / We/ They|   go|   To school every day.|
 He / She / It |   goes| |
IV.
| With he/ she / it we add -s or -es to most verbs.|
| walk --- walks    get --- gets    go--- goes|
V. Sentences with 'not'
  I / You / We/ They|  do not  go|   To school every Sunday.|  He / She / It |  does not  go| |
VI. Questions
  Do|  I / you/ we/ they|  Go to school every day?|
  Does|  he/ she/ it| |
VII.  
VIII. Function
IX. We use the  Simple Present tense 
| For habits|
X.            E.g. He drinks milk for breakfast. XI.                   I sleep early at night. | For repeated actions|
XII.           E.g. I (always/ sometimes/ usually/ often) watch TV at night. XIII.                 He plays football every Sunday. | For general truths|
XIV.           E.g. The sun rises in the east.
XV.                  It is cold in winter.  

PRESENT CONTINOUS
Form
Sentences
  I|   am|   Going  to school now.|
  You / We/ They|   are| |
 He / She / It |   is| |
Sentences with 'not'
  I|  am not|  Going to school now.|
  You / We/ They|  are not  | |
 He / She / It |  is not  | |
Questions
  Am|   I|  Going to school now?|
  Are|  you/ we/ they| |
  Is|  he/ she/ it| |
Function
We use the present continuous tense 
| For things that are happening now|
          E.g. He is riding a bicycle now.
                 Mary is doing homework at this moment | To describe an action that is going on during this period of time|          E.g. Look! A car is coming. 

PRESENT PERFECT
Form
Have/ Has  +   past participle (e.g. gone) 
Sentences
  I / You / We / They|   have  gone|  To school already.|   He / She / It |   has  gone| |
Sentences with "not'
  I / You / We / They|   haven't  gone|  To school yet.|   He / She / It |   hasn't  gone| |
Questions
  Have|   I / you / we / they|    Gone to school yet?|   Has|   he / she / it | |
Function
We use the Present perfect tense 
| To talk about something that happened in the past, but we do not know exactly when it happened|            E.g. I have been to there before.
| To describe an action that started in the past and continues in the present|            E.g. I have studied in this school for five years.                   John hasn't seen Mary since Tuesday. | To describe an action that has completed in the recent past|           e.g. He has just finished his work.

| To describe a repeated action in an unspecified period between the past and now|           e.g. Mary has visited Hong Kong for several times.  | We often use Present Perfect Tense with the following words :-|            'ever'  'since'  'for'  'already'  'just'  'almost'  'never'  'yet'  

PRESENT PERFECT CONTINOUS
1) I have been living in this house since 1972.
2) He has been sitting here for two hours.
3) How long have you been waiting for the bus ?
* Has |have +been +v- ing.
4) I have been running too fast.

Simple Past

1) He lost his book yesterday.
2) I saw a film yesterday evening.
3) Pandit in 1964 Nehru died.
* Verb second form is used in this tense.
Past Continuous...
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