Modal verbs (can, could, should, must)

Modal verbs (can, could, should, must)
Modal verbs (can, could, should, must)
Modal verbs (can, could, should, must)
Modal verbs (can, could, should, must)

Author's Instructions

Modal verbs: can, could, should, must. Language functions: ability, possibility, inability, impossibility, obligation, prohibition, advice.