Expressing obligation: must, mustn't, have to, don't have to Expressing obligation: must, mustn't, have to, don't have to
MUST, MUSTN’T, CAN, CAN’T, COULD, COULDN’T, SHOULD or SHOUL’T MUST, MUSTN’T, CAN, CAN’T, COULD, COULDN’T, SHOULD or SHOUL’T
Modals of Probability (can, could, may, might, must, can't) Modals of Probability (can, could, may, might, must, can't)