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Help the wizard's apprentice document today's failed magical experiment! Select ALL the grammatically correct sentences that describe the situation using advanced concessive clauses.
The correct answers are Powerful though the wizard was, he couldn't turn the teacup into a dragon and Powerful as the wizard was, he couldn't turn the teacup into a dragon.
In advanced English (C1/C2), we can emphasize a concession by moving the adjective or adverb to the front of the clause, followed by as or though, and then the subject and verb (Adjective + as/though + Subject + Verb).
"As powerful the wizard was" is incorrect because it lacks the initial "As" (As powerful as...).
"Although powerful the wizard was" has incorrect word order (it should be "Although the wizard was powerful").
"However powerful was the wizard" has incorrect inversion (it should be "However powerful the wizard was").