Problem: Produce a sentence that would be considered grammatically acceptable

Answer: $50 won't even buy a dress at Bloomingdale's.

Problem: Produce a sentence that would be considered grammatically unacceptable

Answer: You give every senator enough opportunity and he will succumb to corruption.

Problem: Produce a sentence that would be considered grammatically acceptable

Answer:
Maxine read the children Goodnight Moon, but they fell asleep before she got to the end.