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We use inversion in sentences which start with negative adverbs, e.g. never, rarely, seldom, hardly, barely, scarcely, no sooner or phrases with no or not, e.g. under no circumstances, on no condition, on no account, at no time, in no way, not until, not only, etc. In these sentences an affi rmative sentence takes on the order and verb form of a question, i.e.
