Answer:
There are many different ways. Take the imperative: "John, do your homework."
You could change it to:
John, it's time for homework now. (declarative)
John, would you please start your homework? (interrogative)
John, if you don't start your homework, I won't be taking you to the game Saturday. (declarative)
John, the longer you put off your homework the harder it will be to get it done. (declarative)
John, is there something I can do to help you get started with homework? (interrogative)
John! You did your homework! (exclamatory)