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