The Case Ending That Changed Sides
A revision hour at a pre-university college in Hassan turns into a dispute over one sentence on the board: “రాముడు సీతను చూచెను.” The teacher writes a passive version below it: “రాముని చేత సీత చూడబడెను.” Two students, Ayesha and Kiran, must label కర్త and కర్మ in both sentences for a 4-mark grammar answer. Ayesha argues that “సీతను” is always the object because of the -ను ending, so in the passive sentence Sita must still be the object. Kiran says the voice change has altered the case roles and points to “చేత” as the clue. The teacher adds a constraint: the answer must use the terms కర్త, కర్మ, and కరణము correctly, and must explain why the verb ending “-బడెను” matters. The class has 10 minutes and no textbook. A third student asks whether “రాముని” in the passive is an object or an instrument. The teacher refuses to vote; she asks for a rule that covers both sentences and predicts what would happen if the passive were rewritten with “ద్వారా” instead of “చేత.”
1. Which student’s analysis is closer to correct, and what rule should the 4-mark answer state about case endings when a sentence changes from active to passive?
Read the worked answer
Kiran is closer, but the answer needs a sharper rule. In the active sentence, రాముడు is కర్త and సీతను is కర్మ; the -ను ending marks the object because the verb చూచెను is active and transitive. In the passive, సీత becomes the grammatical subject (కర్త) and loses -ను; రాముడు is the agent marked by చేత. The ending -బడెను is the passive marker. Ayesha’s rule ‘-ను always marks object’ fails because it ignores voice. The 4-mark answer should say: case endings are sensitive to voice and verb; -ను marks the object only in an active transitive clause; in the passive, the former object becomes the subject and the agent is marked by చేత. Do not label చేత as కరణము automatically; it can mark agent or instrument depending on context.
2. The third student asks whether “రాముని” in the passive is an object or an instrument. What is the best answer, and how does it affect the labelling of కరణము?
Read the worked answer
In “రాముని చేత సీత చూడబడెను,” రాముడు is the agent of the action, not its object; the object slot is empty because the passive promotes సీత to subject. The phrase “రాముని చేత” is best analysed as an agent phrase, not a pure instrument. This matters because కరణము should be reserved for a means or tool (for example, కత్తితో), while చేత can mark the person by whom an action is done. If the sentence used “రాముని ద్వారా,” many speakers would read it as ‘through Rama’ and the means/instrument reading becomes stronger; the agent reading weakens. So the label depends on the postposition and the verb, not on the English translation ‘by’.
3. Write a one-sentence rule the class can use to identify the కర్త in a passive Telugu sentence, and test it against both sentences.
Read the worked answer
Rule: In a passive Telugu sentence, the కర్త is the noun phrase that agrees with the passive verb and can stand as the subject without -ను; the agent, if stated, is marked by చేత/వల్ల. Test: “రాముడు సీతను చూచెను” - రాముడు agrees with చూచెను, so కర్త; సీతను is కర్మ. “రాముని చేత సీత చూడబడెను” - సీత agrees with చూడబడెను, so కర్త; రాముని చేత is agent. The rule predicts that if we wrote “సీతను రాముడు చూచెను,” -ను still marks కర్మ because the verb is active; word order alone does not change case roles.