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COMMON MISTAKES TENSES WITH “SINCE”

          “Since” is usually used     The present perfect continuous
          with perfect tenses with         is often used with since.
          reference to the past. It
          is not used with the
          present simple.




                                                 Since can’t be used  with the present simple.




                  OTHER PREPOSITIONS OF TIME

          “By” is used to talk about                      “BY” + TIME
          when something will be
          done or finished. It means
          “at” or “before.”




                                NOW                                             3PM



          “Before” is used to                          “BEFORE” + TIME
          talk about something
          that happens prior
          to something else
          or a certain time.




                                NOW                                             6PM



          “After” is used to refer
          to an event that follows
          another event.







                                NOW                     BREAK                FUTURE



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   292-295_Unit_107_Prepositions_of_Time.indd   295                                                  25/07/2016   15:51
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