Punctuation Counts

http://mashable.com/2015/07/02/missing-comma-parking-ticket/?utm_cid=mash-com-fb-main-link

Adjectives: Equal (Coordinate) or Not?

And standing in the middle of the opening was a hulking, terrifying figure.
Deltora Quest: Forests of Silence by Emily Rodda, p. 113

Lief and Barda froze as the hollow, echoing voice rang out.
Deltora Quest: Forests of Silence by Emily Rodda, p. 113

Overjoyed, Lief saw that ideed the wound was repairing itself.  Already, it was just a raw, red scar.  And as he watched the scar itself began to fade, till it was nothing but a thin white line.
Deltora Quest: Forests of Silence by Emily Rodda, p. 125

. . . the last few golden drops dripped into it.
Deltora Quest: Forests of Silence by Emily Rodda, p. 126

How can I tell whether to add the comma?

• Can you reverse the order of the adjectives -- and it still sounds right?
• Can you replace the comma with "and" -- and it still sounds right? 

CSI Answers for November 5: Commas and Adjectives

Conventions in Sentences Investigation 

Commas?  Where do commas belong in this sentence? Copy this sentence, adding two commas where they belong. Label it "C.S.I." with today's date:  Correct answer:   Cool (, ) deep (, )  dark blue water flowed through the  rough limestone rocks in the gorge.   You could replace the commas with "and."   There is not a comma between dark and blue because dark is describing what sort of blue.  There is not a comma between rough and limestone because rough is describing what sort of limestone it is.

Punctuation Matters!

Commas Count

from Grammarly