Modal Verbs in Tamil grammar are words that convey a sense of possibility, probability, necessity, obligation, permission etc. They are used along with the main verb to indicate the mood and tense of the sentence. In Tamil, there are many modal verbs but the most commonly used are ‘வேண்டும்’ (must/need to), ‘முடியும்’ (can), ‘அல்லது’ (may), among others.