Question

1. What a pity! She can't go with us now.
=> We wish 
2. My father last wore jeans many years ago.
=> My father hasn't 
3. We should clean our teeth twice a day 
=> Our teeth
4. My father does more exercise every morning because he wants to be healthy.
=> My father wants

Answer 1

1. What a pity! She can't go with us now.
=> We wish she could go with us now.
2. My father last wore jeans many years ago.
=> My father hasn't worrn jeans for many years.
3. We should clean our teeth twice a day 
=> Our teeth should be cleaned twice a day.
4. My father does more exercise every morning because he wants to be healthy.
=> My father wants to be healthy so he does morning exercise every morning.