No sooner + Past perfect than Past indefinite
e.g. He hadno sooner entered the room than the bell rang.
D.1. She had no sooner left the house … 2. … than they rushed out of the room. 3. No sooner had the teacher asked the question … 4. No sooner … than the icicle fell on the pavement. That was really a narrow escape.5. The singer had no sooner appeared on the stage … 6. … than the pupils burst out laughing. 7. … than the child went to sleep.