用let's try to，why not+v原、don't forget to+v原、It's a good idea

Let's try to study . let's try to run. Why not give me the coin? Why not have dinner together? Don't forget to close the door. Don't forget to drink water. It' a good idea to run in the morning. It' a good idea to give me money.

来了

Let's try to open it Let's try to clean the room; why not do your homework why not answer this question; don't forget to open the door; don't forget to bring the book; it's a good idea to drink milk it's a good idea to listen to the music.