Question

Select the sentence that uses standard English.

1 This book ain't no good.
2 This book ins't any good.

Answer 1

Number 2 is right, it's a formal way to say it.
This book isn't any good.

Number one is just informal.

Answer 2

The first sentence is English, but not standard English, because "ain't" is not technically a word. So, the answer is Sentence #2.