EXERCISE 32–14Major uses of the comma
Example:

“I don’t expect snow tonight,” the meteorologist said “but you should prepare for a steady snowfall all day tomorrow.”

“I don’t expect snow tonight,” the meteorologist said, “but you should prepare for a steady snowfall all day tomorrow.”

Commas are used correctly in the second sentence to set off the speaker from the quoted words.

For more help, see section 32h.