Because a comma is used to separate two meanings without using and
Figurative language is mostly used to leave a long lasting impression of something. Writers create images using figurative language so as to have us analyze and observe them in more detail. All of this is especially true of poets and poems who use metaphors, personification, and other narrative devices, so as to convey meaning almost all the time.
Answer:
He advised us that we should not be late
Please acknowledge receipt of this letter.
I would write my notes in the margins, if that's what you're looking for.