Page 854 - Wordsmith A Guide to College Writing
P. 854

Necessary Shift:




                                past                                present
                           Megan was a poor student in high school, but she is doing

                        well in college.



                        Because the sentence above refers to both the past (high

                        school) and the present (college), the verb tense shift is

                        necessary.




                        Unnecessary Shift:



                                          past                present               present

                           When Ryan came into the room, he breaks into a big smile
                        and says, “Guess what?”




                        Since the action in this sentence is a single, continuous event,

                        there is no need for a shift to present tense. To correct an

                        unnecessary tense shift, decide which tense is appropriate, and

                        use that tense for all verbs in the sentence.



                        Corrected:




                                          past                past                  past
                           When Ryan came into the room, he broke into a big smile

                        and said, “Guess what?”




                        Unnecessary Shift:
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