What is the difference between the affirmative and negative forms? ​

ответ:  the ways that grammar encodes negative and positive polarity in verb phrases, clauses, or other utterances. Essentially an affirmative (positive) form is used to express the validity or truth of a basic assertion, while a negative form expresses its falsity. Examples are the sentences "Jane is here" and "Jane is not here"; the first is affirmative, while the second is negative.