Point of View - 1st, 2nd, 3rd Tenses

English has three "persons" or points of view:

•     first person - the speaker
             I, me, my, mine, we, us, our, ours
   
•     second person - the person spoken to
           you, your, yours
   
•     third person - the person or thing spoken about
           he, him, his, she, her, hers, it, its, they, them, their

    Unless the meaning of a sentence clearly requires a change, keep person consistent within a sentence.
    Shifts in person usually occur with changes from the third to the second person point of view.
    Error - shift in person
        
    Error repaired
        

    If the meaning of a sentence clearly requires a change, then you may change person as needed.
    Example requiring a change in person
        
    Since both I and the others are doing something in the above sentence, the shift in person is justified.


Also another site to visit for more information:  http://www.mesacc.edu/~paoih30491/PointofView.html