GRAMMAR EXERCISES: MODALS
HAVE TO AND MUST: OBLIGATION
DON´T HAVE TO / MUSTN´T : PROHIBITION AND ABSENCE OF OBLIGATION
MUST / HAVE TO / OUGHT TO : OBLIGATION
CAN, COULD, HAVE TO, MUST, MIGHT AND SHOULD
CAN, COULD, MAY, MIGHT, MUST: PROBABILITY
MODAL VERBS INTERMEDIATE LEVEL
