lunes, 20 de abril de 2015

Tiempos verbales

            Tenses Chart                       

 Present Simple                               

  Structure and Usage


               PAST                PRESENT         FUTURE

                    Tom takes a bus to work every day.

The present simple is used to express daily routines and habits. Adverbs of frequency such as 'usually', 'sometimes', 'rarely', etc. are often used with the present simple.This tense is often used with the following time expressions: always,usually, sometimes, everyday, on Sundays, Tuesdays, etc.
Basic Construction
Positive
Subject + Present Tense + object(s) + time Expression
Tom             takes               a bus to work       every day.
Negative
Subject + do / does + not (don't / doesn't) + verb + object(s) + time Expression
They don't  go to Chicago  very often.
Question
(Question Word) + do / does + subject + verb + object(s) + time Expression
When                     do                  you        play         golf?
Test your understanding with this short quiz.


Present Continuous for Action at the Moment

Structure and Usage
                                  PAST                      PRESENT               FUTURE
                                                                    NOW!
                                                       Frank is watching TV now.

One use of the present continuous tense is for action that is occurring at the moment of speaking.  Remember that only action verbs can take the continuous form. 
This tense is often used with the following time expressions: at the moment, now, today, this morning / afternoon / evening

Basic Construction
Positive
         subject  + be + verb + ing + object(s) + time Expression

            She            's watching            TV           at the moment.
 
Negative

        Subject + be + not (isn't, aren't) + verb + ing + object(s) + time Expression

           They             aren't                        having               fun               this morning.

Question
      (Question Word) + be + subject + verb + ing + object(s) + time Expression

                  What           are       you            doing                         at this moment?

Past Simple

Structure and Usage

                PAST                               PRESENT           FUTURE I bought a present for Tim yesterday.                                         
The past simple is used to express something that happened a past point in time.
Remember
to always use a past time expression, or a clear contextual clue when using the past simple. If you do not indicate when something happened, use the present perfect for unspecified past.
This tense is often used with the following time expressions:
... ago, 
in + year / month, yesterday, last Monday/ week, when....
Basic Construction
Positive

Subject + Past Tense + object(s) + time Expression
         I              went        to the doctor's      yesterday.

Negative

Subject +did +not (didn't) + verb + object(s) + t     ime Expression
They              didn't                join           us for dinner     last week.

Question

(Question Word)+did+subject + verb+object(s)+time Expression
              Why      did      you        buy     that pullover    yesterday?

Future with Going to for Future Plans


PAST              PRESENT                   FUTURE PLAN
                                                 Jane is going to visit  Jim next weekend.

The future with 'going to' is used to express future plans or scheduled events. It is often used instead of the present continuous for future scheduled work events. Either form can be used for this purpose. 
This tense is often used with the following time expressions:
... next week / month, tomorrow, on Monday, Tuesday, etc.

Basic Construction

Positive

Subject + be + going to + verb + object(s) + time Expression

Tom            is going         to fly           to Los Angeles next  Tuesday.

Negative

    Subject   +  be not(isn't,aren't)+goingto+verb+object(s)+time Expression
          They aren't going to attend the conference next month.

Question

(Question Word) + be + subject + going to + verb + object(s) + time Expression
Who                    are       you          going to    meet      tomorrow?

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