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PRESENT PERFECT SIMPLE VS PAST SIMPLE





















                    Present Perfect                                                                                                                  Past Simple







                                           Simple






                                                                                                                                  For actions that






          For actions that                                                                                                        happened at a definite




          happened in the past, but                                                                                               time in the past or





          we do not say when                                                                                                      actions that were started




          exactly or still happening                                                                                              and were completed in




          in the present.                                                                                                         the past.










                              Unfinished time                                                                                                            Finished time





                      - I have worked as a                                                                                        - They lived in Korea from




                          doctor since 2010.                                                                                                              2000 to 2005.










                                Indefinite time                                                                                                           Definite time





                 - I have seen the KLCC.                                                                                             - I saw the KLCC in 2012.










                                       Experience                                                                                 Series of finished actions.




          - Have you listened to this                                                                                                - First, he listened to the




                                                 song?                                                                                            song and then he


                                                                                                                                           watched a television.







                                                Result




           - She has already listened                                                                                                              Repeated action.




                to this song four times.                                                                                                            - He went to the


                                                                                                                                            shopping mall every





                                                                                                                                               weekend last year.















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