Punctuation Poem

I am a full stop.
I look just like a dot.
Every time you see me,
You must stop!

I am a question mark.
You might ask me why?
Every time you see me,
Your voice will go up high.

I am a comma.
I look just like a hook.
Every time you see me,
Slow down and look!

I'm an exclamation mark.
I'm full of surprise.
Every time you see me,
Widen your eyes!

We are speech marks.
We're in groups of two.
Every time you see us,
Talking is what we do.