Comma punctuation

Comma - The Grammar Guide comma Comma · Introduction · The Evolution and Development Tendency of Meteorological Archives in the History of Meteorological Development by Yu Chen · Sunspot commas If you can replace while with as, then it shouldn't have a comma before it It is just a normal subordinating conjunction If you can replace while with whereas

command Use a comma to separate elements of a list, distinguish groups of words that go together, mark conjunctions between complete thoughts, and more This handout