GATE 2017 CE (CE2) – Question 1
The event would have been successful if you ______ able to come.
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Show answer and explanation
Correct answer: (B) had been
Explanation
The main clause would have been successful expresses a counterfactual past result. Its if-clause uses the past perfect: if you **had been** able to come. Hence **B**; are and have been do not fit the past counterfactual construction.