Armed Forces Classification Test (AFCT) English Practice Test

The choice of "Ain't" as an example of nonstandard English is accurate because it is a colloquial contraction that does not follow the standard grammatical rules of English. In formal writing and speech, the correct forms would typically be "isn't," "aren't," or "haven't," depending on the intended meaning. Nonstandard English often includes variations in grammar, pronunciation, and vocabulary that may be considered informal or regional, which is characteristic of "ain't."

In contrast, the other sentences—"He goes to school every day," "She doesn't like apples," and "Are you coming with us?"—are examples of standard English. They adhere to proper subject-verb agreement and use accepted grammatical structures, making them appropriate for both formal and informal contexts.