Ответ:
1 knew
2 would went
3 had consulted
4 had been
5 would be
ex2
1 He wish he have had enough time to finish his paper.
2 I wish you would be with us these days.
3 I wish I had not made you upset by telling you this news.
4 My friend wish he had not entered the university.
ex3
1 They wish they had paid attention to his warnings.
2 She wish she had told him this story earlier.
3 If only I was free now!
4 We wish we had asked his advice.
5 If only we had holidays now.