must buy
He knows what he has to buy.
Natalja deve comprare delle cose, domani.
Natalja has to buy some things tomorrow.
— Vi presento Toni Erdmann (2016)
Chi verrà al concerto di sabato deve comprare il biglietto entro domani.
Anyone attending Saturday's concert must buy their ticket by tomorrow.
Deve comprare loro dei regali.
He has to buy them some presents.
He knows what he has to buy.
Tom sa cosa deve comprare.
Tom knows what he has to buy.