Problem: Produce a sentence that would be considered grammatically acceptable

Answer: The more articles he reads, the fewer people he thinks under the current circumstances will go into linguistics.

Problem: Produce a sentence that would be considered grammatically unacceptable

Answer: Who does Phineas know a girl who is behind?

Problem: Produce a sentence that would be considered grammatically unacceptable

Answer:
John inquired that he should read it.