Maintaining consistency

Coherence in a draft can suffer from three kinds of shifts:

in point of view Definition for point of view, opens in dialog (for example, from I to you or from anyone to they)
in verb tense (for example, from swam to swims)
in questions and quotations (from direct Definition for direct, opens in dialog to indirect Definition for indirect, opens in dialog or vice versa)

Point of view and verb tense in academic writing