1. On no account should you use a lift immediately after an earthquake.
2. Never before had we listened to such an interesting speech.
3. By no means would they reject such an offer.
4. No sooner had Julie just arrived than the lights went out.
5. Not once did I receive good marks in Math at school.
6. had I started eating when
7. has he testified that he can leave
Not until + trợ động từ + S + V + that + …
8. no circumstances can you interrupt me during the meeting.