We use an imperative sentence to make a request or give a command. End each imperative sentence with a period (.).
Help keep the world a cleaner place.
Remember to write your name on the paper.
Everyone needs to run five times around the track.
We use an exclamatory sentence to express strong feelings. End it with an exclamation mark (!).
Look at that van!
Happy birthday grandma!
I hate spiders!
Remember to begin every sentence with a capital letter!