Dobrodošli na stranicu Modals of Deduction: Can't, Might, Must.
Can't, Might, Must često koristimo da izrazimo koliko smo sigurni u vezi s nečim.
Can't u tom slučaju prevodimo = ne može biti, nemoguće da je
Might = može biti da je, možda je
Must = mora biti, sigurno je, 100% je

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He ______ be a university student. He's far too young.
He _____ be cold. He's not wearing a coat.
He _____ be going to the gym. He's carrying a sports bag.
Nigel ______ earn much money in his job. He's still living with his parents.
Your sister _____ have a lot of money if she drives a Porsche.
"Why is Tina so happy?" - "I'm not sure, but she ______ have a new partner."
He _____ be enjoying the party. He isn't talking to anybody.