John had never been to such a fantastic restaurant. --> Never ____ to such a fantastic restaurant.
had John been
As soon as they had eaten dinner, the ceiling crashed onto the dining table.-->No sooner _____ dinner than the ceiling crashed onto the dining table.
had they eaten
I had just finished writing my essay when the examiner announced the end of the exam. --> Scarcely ____ my essay when the examiner announced the end of the exam.
had I finished writing
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