Answer:
The change in a verb form is acceptable when there is a difference in number, voice, tense or person in a sentence.
Step-by-step explanation:
Inflection is defined as the change in verb tense when one is trying to convey a change in those four ideas. The number of the sentence refers to changing the subject from plural to singular or vice-versa.
When changing the active or passive voice of the sentence, or the verb to past tense, then there must be a shift in verb form.