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Select ALL the sentences that are correct examples of the third (past unreal) conditional.
The correct answers are If she had known about the meeting, she would have attended. and If I had studied harder, I might have passed the exam.
Third (past unreal) conditionals use "if" + past perfect, and "would have/could have/might have" + past participle in the result clause. "If you would have called..." is incorrect; use "If you had called...".