Simple Past Tense in Tamil grammar, known as irandha kaalam, conveys an action that has already been completed. The verb forms change to represent this tense usually by adding a suffix. The present tense ‘senji’ (do) for example becomes ‘senjiyachu’ (did). Keep in mind that verb endings can change based on the gender and plurality of the subject in question, making it a more complex aspect to master in Tamil grammar.