instruction: Is the next sentence syntactically and semantically acceptable?

If anybody keeps spoiling the children, John keeps.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I shaved myself.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John leftn't the party early.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Eleanor blamed Willoughby for Marianne's unhappiness.

response:
acceptable