Choose the sentence that correctly employs the past conditional inversion without 'if'.

Answer and explanation

Correct answer: D. Had the emergency team arrived five minutes earlier, the vessel could have been saved.

  1. Step 1: An inverted third conditional replaces 'If + subject + had + past participle' with 'Had + subject + past participle'. Step 2. 'Had the emergency team arrived...' is the correct inverted form. Answer: Had the emergency team arrived five minutes earlier, the vessel could have been saved. Why not the others: 'Were... arrived' and 'Did... had arrived' are ungrammatical; 'Should' inverts first conditional present possibilities.

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