1. PAST
   1. Past Simple
      1. Completed Action in the Past
         1. I saw a movie yesterday.
      2. Duration in Past
         1. Shauna studied Japanese for five years.
      3. Habits in the Past
         1. I studied French when I was a child.
      4. Past Facts or Generalizations
         1. She was shy as a child, but now she is very outgoing.
   2. Past Continuous
      1. A completed action in the Past
         1. Last night at 6 PM, I was eating dinner.
      2. Interrupted Action in the Past
         1. I was watching TV when she called.
      3. Parallel Actions
         1. I was studying while he was making dinner.
      4. Atmosphere
         1. When I walked into the office, several people were busily typing, some were talking on the phones
      5. Repetition and shocking with "Always"
         1. He was constantly talking. He annoyed everyone.
   3. Past Perfect
      1. Completed Action Before Something in the Past
         1. I did not have any money because I had lost my wallet.
      2. Duration Before Something in the Past (state verbs)
   4. Past Perfect Continuous - State verbs No!
      1. Cause of Something in the Past
         1. I did not have any money because I had lost my wallet.
         2. Betty failed the final test because she had not been attending class.
      2. Duration Before Something in the Past
         1. State verbs NO! She had been working at that company for three years when it went out of business.
         2. We had had that car for ten years before it broke down.
   5. Past with "would"
      1. Talk about repeated past actions.
   6. Past with "used to"
      1. Past state/actions that don't happen now.
      2. If something happened only once we can’t use ‘used to’ or ‘would’ – we must use the past simple.
2. PRESENT
   1. Present Simple
      1. Repeated Actions
         1. Does he play tennis? / The train leaves every morning at 8 AM.
            1. an action is repeated or usual. The action can be a habit, a hobby, a daily event, a scheduled event or something that often happens.
      2. Facts or Generalizations
         1. Cats like milk.
            1. the speaker believes that a fact was true before, is true now, and will be true in the future. It is not important if the speaker is correct about the fact. It is also used to make generalizations about people or things.
      3. Now (state verbs)
         1. I am here now. / He has his passport in his hand. / He needs help right now.
            1. an action is happening or is not happening now.
   2. Present Continuous
      1. Now (action verbs)
         1. You are learning English now.
      2. Longer Actions in Progress Now
         1. Are you working on any special projects at work?
      3. To describe a picture
         1. In this picture the woman is standing near the window.
      4. Repetition and shocking with "Always"
         1. He is constantly talking. I wish he would shut up.
            1. The Present Continuous with words such as "always" or "constantly" expresses the idea that something irritating or shocking often happens. Notice that the meaning is like Simple Present, but with negative emotion. Remember to put the words "always" or "constantly" between "be" and "verb+ing."
   3. Present Perfect
      1. Acción que comenzó en el pasado y que acaba de finalizar. Pone el énfasis en el RESULTADO DE UNA ACCION COMPLETA y no en la acción en si misma.
         1. TOPIC:
         2. MULTIPLE ACTIONS AT DIFFERENT TIMES. I have seen that movie twenty times.
         3. EXPERIENCE. I think I have seen that movie before.
         4. CHANGE OVER TIME (for,since). My English has really improved since I moved to Australia.
         5. ACCOMPLISHMENTS. Man has walked on the Moon.
         6. AN UNCOMPLETED ACTION you are expecting (yet,still). James has not finished his homework yet.
      2. I have read a book (destaco que he leído un libro, que lo he terminado, y no el hecho de haber dedicado un tiempo a la lectura).
   4. Present Perfect Continuous - State verbs No!
      1. Destacar la acción en sí misma más que el resultado; no se precisa si la acción ha finalizado o no.
         1. They have been talking for the last hour.
         2. Recently, I have been feeling really tired.
      2. I have been reading a book (resalto lo que he estado haciendo; no indico si he finalizado el libro o no)
   5. Unspecified Time Before Now Duration From the Past Until Now
3. FUTURE
   1. Be going to
      1. Plan
         1. When are we going to meet each other tonight?
      2. Prediction
         1. I think he'll pass the exam. *más probable que will
   2. Future Simple: will/shall
      1. Instant Decisions
         1. I think I'll go home early.
      2. Offers
         1. Shall I open the windows? *offer: will -> shall
      3. Promises
         1. I'll always love you.
      4. Prediction
         1. I think he'll pass the exam. * menos probable que be going to.
   3. Present Continuous - arrangement
      1. I am meeting some friends after work.
   4. Present Simple - timetable
      1. The train leaves tonight at 6 PM.
   5. Future Continuous [will be + present participle]
      1. You will be waiting for her when her plane arrives tonight.
   6. Future Perfect [will have + past participle]
      1. You will have perfected your English by the time you come back from the U.S.
   7. Future Perfect Continuous [will have been + present participle]
      1. You will have been waiting for more than two hours when her plane finally arrives.