Difficulty: Easy
Correct Answer: had you told
Explanation:
Given data
Concept/ApproachThird conditional structure: If you had told me … → Inversion without "if": Had you told me …. Use the bare past participle after "had".
Option analysisC. "had you told" → correct inverted conditional. ✔A/D → wrong auxiliary ("would have" in if-clause / present perfect).B → ungrammatical doubling ("Had you have told").E → original is incorrect.
Corrected sentence"Had you told me about your problem, I would have helped you."
Final Answerhad you told
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