Identifying Unnecessary Shift in Tense in Sentences

Unnecessary Shift in Tense in Sentences

Which of the following sentences has an unnecessary shift in tense?

A. The timer keeper started the clock and then stops in abruptly
B. The timer keeper starts the clock and then stops it abruptly
C. The timer keeper started the clock and then stops abruptly

Explanation: The correct sentence without an unnecessary shift in tense is:
B. The timer keeper starts the clock and then stops it abruptly.

The incorrect sentence with an unnecessary shift in tense is A. The timer keeper started the clock and then stops in abruptly.

Which of the following sentences has an unnecessary shift in tense?

The sentence that has an unnecessary shift in tense is A. The timer keeper started the clock and then stops in abruptly.

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