41 Verbi modali e loro sostituti per probabilit / possibilit e deduzione/supposizione Modal and non-modal verbs for probability/possibility and deductions/suppositions condizioni have participio passato persona pu darsi che scarsa supposizione Esprimono probabilit o possibilit : riferita al presente: may, could + forma base (pi elevata: .......................................) It may / could be cold. might + forma base (pi .......................................: potrebbe darsi che) It might rain later. riferita al passato: could, might + have + ....................................... passato They could/ might have arrived too late for the flight. per tutti i tempi: be likely + infinito, che pu essere costruito: con la ....................................... come soggetto del verbo be likely Tom is likely to come to York with us. con la forma impersonale, meno usata, It is likely that... It is likely that Tom will come to York with us. Esprimono possibilit concreta (l azione si pu verificare perch esistono le .......................................): riferita al presente: can, could + forma base You can / could come in my car. riferita al .......................................: could + have + participio passato They could have come by train because there was no strike. Esprimono deduzione, ....................................... o opinione convinta: riferita al presente: can t/cannot, must + forma base She looks so young. She can t be fifty. Look at his smile! He must be friendly. He can t have left so late. riferita al passato: can t, must, mustn t, could, couldn t, might + ....................................... + participio passato 112 The flight must have been delayed. It couldn t have been so cold! Verbi modali e loro sostituti per probabilit /possibilit e deduzione/supposizione