In a company name such as "ABC Corp," do not use a comma. However, use a comma in the formulation, "ABC, Inc."
No comma is necessary before "Jr.", "Sr.", and the like. No comma has ever been necessary before "III", "IV", etc. From the Chicago Manual of Style (http://ow.ly/gcv0):But please note that within text, if you decide to use the more traditional comma before Jr. or Sr., the function of the comma is to set off these abbreviations, so an additional comma is needed after the abbreviation if the sentence continues (as in my first sentence above).
The comma goes after the name. Hello John,
Return to sender does not require quotation marks or a comma.
The comma goes after the business between the name and the LLC. Business Company, LLC
before
No, a comma is not necessary.
no
You would use a comma before it. Xerox, Inc.
if the main or most important part is before the main parts you use a comma, but if it is after then no comma
Yes, you can put a comma before except. Example of a comma before except in a sentence- She can do it, except that the mountain is too steep
No
no
no
No, typically a comma is not used before "III" when it follows a name or title.
A comma is not typically used before "therefore." However, a comma may be used after "therefore" to separate it from the rest of the sentence when it is starting the clause.
Use a comma before a parenthesis when the information within the parentheses is not necessary for the sentence to make sense. Use a comma after a parenthesis when the information inside the parentheses is necessary for the sentence to be understood.