Which auxiliary verb correctly completes the sentence below?
Cevap:No sooner 【had】 the newly appointed managing director taken office than a major financial crisis erupted.
Cevap
had
When a sentence starts with the negative adverbial 'No sooner', subject-auxiliary inversion occurs and requires the past perfect auxiliary 'had' before the subject to match the past participle 'taken' and correlate with 'than' in the subsequent past clause.
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Anahtar Kavram
Negative Inversion and Past Perfect Aspect ('No sooner had... than')