how to understanding tenses easily?
these are:
        we just memorize the characteristic of each tenses
               -PAST---------V2-
               -FUTURE------WILL+V1-
               -CONTINUOUS---BE+VING-
               -PERFECT---------HAVE+V3-
               -PRESENT-------IF NO V2 AND WILL THERE-
And the other just combine it as muchas you need.....
          for more understand with it,  see it next week