TSA CBT Practice Test

A tense shift refers to changing from one verb tense to another within a sentence or a paragraph. This can lead to confusion for the reader and disrupt the flow of the writing. The correct answer is A because it directly addresses the definition of a tense shift in the context of grammar and writing. Option B, using a verb as an adjective, does not relate to the concept of tense shifts. Option C, combining clauses, and option D, modifying a pronoun, are also not directly related to the definition of a tense shift.