We use exclamation points to show a strong feeling. This could be feelings of anger, happiness, surprise, or fear. Imagine these sentences being said loudly as that's what an exclamation point does to a sentence.
He's so handsome!
I forgot to lock my car!
So good to see you again!
I found a gray hair!
QUESTION MARKS (?)
Question marks are used in sentences asking a question. These are known as interrogative sentences. Usually sentences beginning with why, what, when, how, are, can, how, is, would, or were will end in a question mark.
Are you going to the meeting this afternoon?
When does your plane land?
Is he old enough to drive?
Who is your favorite singer?
Other times we can use it if we want to verify information someone has said.
I forgot to lock my car! You forgot to lock your car?
I found a gray hair! You found a gray hair?
ONE IMPORTANT THING TO REMEMBER! DON'T USE TOO MANY EXCLAMATION POINTS IN A SENTENCE OR YOUR WRITING WILL SOUND STRANGE. HAVE YOU EVER SEEN THIS EPISODE OF SEINFELD WHERE ELAINE USES TOO MANY EXCLAMATION POINTS?