Present Perfect Tense

A 'past with present relevance' Tamil doesn't mark separately

Tamil's ordinary past tense covers both 'I ate [at some point]' and 'I have eaten [and that matters right now]' without distinguishing them grammatically — context alone tells you which sense is meant. English insists on marking this difference with an entirely separate tense: have/has plus the past participle (eaten, gone, seen) for the 'still relevant now' sense, versus the simple past (ate, went, saw) for a plain historical fact. Since Tamil gives you no built-in cue for when to switch, this becomes a genuinely new decision to practice, not something to derive from habit.