TENSES:

   Past Perfect Continuous: I had been watching TV before she came.

   Past Perfect Simple: I had arrived before her.

   

   Past Continuous: I was watching TV when she came.

   Past Simple: I arrived at ten, just when she came.

   

   Present Perfect Continuous: I have been thinking about it the whole night.

   Present Perfect Simple: I have lost my key, I don´t know where it is.

   

   Present Continuous: I am having breakfast at the moment.

   Present Simple: I usually play tennis on Monday.

   

   Future Continuous: I will be studying math all afternoon.

   Future Simple: I will go there tomorrow.

   

   Future Perfect Continuous: We will have been living here for 20 yrs by next year.

   Future Perfect Simple: I will have it done by tomorrow.

   

   THE RULE OF CONSISTENCY!!!

   

   PRESENT SIMPLE AND CONTINUOUS



   PS: Actions in progress at the moment of speaking

   + repeated temporary actions (She is studying English in Oxford)

   Key words: NOW, AT PRESENT, AT THE MOMENT,

   

   PC: Repeated actions

   Key words: REGULARLY, OFTEN, ALWAYS, EVERY.., SOMETIMES, NEVER,            USUALLY

   

   Notes: LOVE, LIKE, HATE, WANT, NEED, PREFER, KNOW, REALISE, SUPPOSE, UNDERSTAND, BELIEVE,
   REMEMBER, COST, BELIEVE, SEEM are not used in continuous tenses + SEE, HEAR, SMELL, TASTE

   Exceptions:                        I am seeing her (tomorrow morning) x I see x I can see her

                                      He is selfish x He is being selfish

   

   Present tense forms are also used to refer to future time.

   

   Beware!!!      lie        lay       lain                  lying

                           lay       laid      laid                 laying