grammar-

-a  class  teacher  was  giving  lessons  on grammar  , teaching  the  difference  of  past  present  and  future  tenses  and  their  usage, he  asked  his  class  to  give  examples  in easy  one  line  sentence  to  explain the  tenses, the  whole  class  raised  their  hands  , happily  impressed  the  teacher  pointed to  one  boy  to  stand  up  and  speak, the  boy  answered  in a  singing  tone-i had  loved  you  in the  past, i  love  you  today  and  i  shall  always  love  you  in the  future