Please answer my doubt.

Solution:-

Your question is incomplete. I am assuming that you want sentences framed using some coordinating conjunctions. Accordingly, here is your solution:-

1. He is a good batsman and excellent fielder. ( Conjunction used - and)
2. He is old yet he is active. ( Conjunction used - yet)
3. You are hungry so please eat something.

If this was not what you had in mind, please repost the complete and clear question in a separate thread. Our experts would be happy to help you there.