present perfect simple & progressive

present perfect simple & progressive

1. +

   • I have worked

2. -

   • I haven't worked

3. ?

   • Have you worked?

4. present perfect simple

5. uses

   • to talk about an action which happened in the past but the exact time is not mentioned
     • example: I've already done that
   • to talk about a state which started in the past and continues up to the present
     • example:Mary has had this mobile phone since September
   • to talk about an action that happened in the past and finished but the results are abvious in the present
     • example: I've just finished my project

6. Time expressions: just, yet, already,never ,ever,before, always,for ,since ,so far, how long, once,etc.

7. present perfect progressive

8. +

   • I have been working

9. -

   • I haven't been working

10. ?

    • Have you been working ?

11. uses

    • to emphasise the duration of a state or action which started in the past and continues to the present
      • example: I've been learning English for 6 years
    • to talk about an action which happened over a period of time in the past and may have finished but the results are abvious in the present
      • example: we've been walking around all day. that's why we're so tired

12. Time expressions: for, since, how long, all day/week,etc.