instruction: Is the next sentence syntactically and semantically acceptable?

The person who never had he been so offended was Sir Thomas.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Has not the potion worked

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I'm sure that I ever met him.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Bill's mother's friends and John are waiting at the restaurant.

response:
acceptable