When you want to introduce a list
To replace the word and in compound sentences
It would be appropriate to use a comma between compound subjects or compound verbs.
No, a comma before "as appropriate" is not necessary. It depends on the context of the sentence and whether it flows better with or without the comma.
Not usually : "Thank you for listening to me" does not need a comma. However, if you write their name afterward ("Thanks, Fred."), you need a comma after thank you.
It is not appropriate to use a comma before a coordinating conjunction if the sentence does not contain two independent clauses. For example, "I enjoy coffee but not tea" does not require a comma before "but" because it is a simple sentence, not two independent clauses.
You use commas between items in a list, between the date and the year, and after the greeting in a friendly letter.
It is usually appropriate to place a comma before "but." One should not use a comma after "but."
Not necessarily. There is no word or phrase in English that requires a comma before or after it. Whether to use a comma is entirely a matter of sentence structure.
the appropriate thing is a comma
Maybe. Maybe not. Sometimes. Othertimes not. Whether the use of a comma is or is not appropriate depends on the context.
No. After the word and comma can not be used, as it is grammatically inappropriate to use comma after conjunctions such as and, which are called coordinate conjunctions.
No, the comma is not used correctly in "Memphis Tennessee 43609." The appropriate punctuation would be a comma followed by a space after "Memphis," such as "Memphis, Tennessee 43609."
No, a comma is not necessary.