Inversion with negative adverbials is when you change the usual word order in a sentence because you start with a negative adverbial. This often makes the sentence sound more formal or emphasizes the negative part.
Common negative adverbials that require inversion:
1. Never
2. Rarely
3. Seldom
4. Hardly
5. Barely
6. Little
7. Not only
8. No sooner
9. Only then
10. In no way
Structure:
1. Start with the negative adverbial.
2. Follow it with the auxiliary verb (if there is one) or the verb "to be."
3. Then, add the subject.
4. Finally, complete the sentence.
Examples:
1. Never have I seen such a beautiful sunset.
2. Rarely do we get snow in this area.
3. Seldom does he arrive on time.
4. Hardly had I finished my meal when the phone rang.
5. Little did she know about the surprise party.
6. Not only did he win the race, but he also set a record.
7. No sooner had I left than it started to rain.
8. Only then did I understand the problem.
9. In no way should you feel guilty about it.