He said to his friends, “Let us play now”.

1. He requested to his friends that they should play then.
2. He proposed to his friends that they should play then.
3. He proposed to his friends that they would play then.
4. He proposed to his friends that we should play then.

Answer: He proposed to his friends that they should play then.

Explanation: Direct speech এর Reported speech টির প্রসঙ্গ যদি ‘প্রস্তাব রাখা’ অর্থে ব্যবহৃত হয় তাহলে Indirect speech এর স্থলে, ‘Proposal’ ব্যবহৃত হবে; that clause এর subject এর পর modal auxiliary ‘should’ ব্যবহৃত হবে এবং adverb ‘now’ then এ পরিবর্তিত হয়ে যাবে। Direct speech এ সাধারণত let us দ্বারা Proposal বোঝালে let us এর পরিবর্তে indirect speech এ we should বসে।