Ответ:
1) My father isn't a doctor
2)He doesn't work at a hospital
3)The girl doesn't have a nice dress
4)You mustn't be serious
5)Yesterday we didn't visit our Granny
6)I won't invite her to the party
7)She isn't sleeping now
8)I have breakfast not at 7
9)The haven't passed theit exams
10)We weren't busy yesterday