If Ann had practiced hard last week, she would have improved her intonation.
I wish I knew where they live.
I wish we had taken umbrellas, we got wet very quickly.
If you had bought everything beforehand, we wouldn't have wasted so much time.
If I were you, I would go to the South every summer.
1) practiced, have improved (Это связано с типами использования будущего времени после If, это 3-ий тип, кандишенал)
2) knew
3) we had taken
4) had bought, wouldn't have wasted (Тоже 3 кандишенал, где would)
5) if I were you, I would go (Это 3 кандишенал)
С учительницей решали!