Răspuns:
2 He can't know the secret
3 Mike couldn't have got a new car
4 Susan should have paid the phone bill
5 They couldn't live here
6 They must have had left the party early
7 He couldn't have called me
9 She must have been keeping secrets from me
10 She must be looking for a new job
11 David couldn't have gone to the supermarket
12 He must be working at the library