When If Clause is in Past Perfect Tense, we use would + have + verb3 in the Main Clause.
- If he had come to me, I would give him my notes. (incorrect)
- If he had come to me, I would have given him my notes. (correct)
♦ The structure of If Clause in past perfect tense could be like this also:-
Had + subject + verb3 + would + have + verb3
- Had he come to me, I would have given him my notes. (correct)
To Express regret, unfulfilled wish, and imaginary condition, we use plural verb ‘were’ after if/ I wish/ as if/ as though.
- If I were you, I would not tolerate him. (correct)
- If Mahatma Gandhi were alive he would start weeping to see the present condition of India. (correct)