The use of a comma before the 'and' in a list should generally be avoided. Its use is acceptable when it assists in the meaning of a sentence, especially where one of the items in the list is already joined by 'and' (they had a choice between croissants, bacon and eggs, and muesli).
A comma should be used before the word "but" when it is connecting two independent clauses in a sentence. If "but" is joining two words or phrases within a single clause, then a comma is not necessary.
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, a comma is not necessary.
Generally a comma does not go immediately before or after a conjunction, which is a joining of ideas. You may put a comma before one if it introduces an independent clause, especially if there would normally be a pause in speech. For example: We arrived after midnight, and by then the party had been over for an hour.
no
no
You can use a comma after an opener , so if it is 'Finally' the opener you are talking about, then yes.
In a company name such as "ABC Corp," do not use a comma. However, use a comma in the formulation, "ABC, Inc."
You can use ", and" or just "and" but not just a comma.
Yes, a comma should be used after "which" when it introduces a nonrestrictive clause in a sentence.
Example: It was hot, humid, and raining. In the example above, the comma after "humid" is unnecessary but acceptable. The use of the comma before 'and' is called the 'serial comma' or the 'Oxford comma', it's optional. Many people use the serial comma for clarity. The other use of a comma is to break up a long sentence, and signifies a slight pause. Example: He hit the ball, dropped the bat, and ran to first base.