Yes and No, either way, it doesn't matter.
Ans no. 2If you want to write correct English then it does matter. You should separate items in a list by commas except thatthe last two items are separated by the word 'and' but with no comma.
Example - The five full vowels in the English language are a, e, i, o and u.
It depends upon the situation. While the comma is often left out in a series, it is still considered proper to use it in a series of three or more words to avoid confusion and to afford proper pausing when reading aloud. As an example: I enjoy reading, writing, and singing. As opposed to: I enjoy reading, writing and singing. Another place where you would use a comma before "and" is similar to when "but" is used. Basically, if you could use a period where you put the comma and start the sentence without either conjunction. For example: He ran through the door, and he screamed at the top of his lungs! Which could also be written: He ran through the door. He screamed at the top of his lungs! You can also find more information at www.chicagomanualofstyle.org/.
Yes, however it's usually grammatically unnecessary. Consider: "You don't need me, and I don't need you." The comma makes it look/sound better, but it's not really needed.
In a compound sentence, the comma would be placed before the word but.
"Inc" is not a word, it's an abbreviation for "Incorporated," and there should be a comma before it.
A comma should be placed before the word 'but'. For example, "I wanted to go to the shop, but I could not find my shoes."
It is usually appropriate to place a comma before "but." One should not use a comma after "but."
no
If the word 'however' is in the sentence, commas should be placed on both sides. Eg: Blahblahblah, however, blahblahblah. If,however, the word 'however' opens the sentence, the comma should only be placed after the word. Eg: However, blahblahblah.
Not necessarily. There is no word that always requires a comma before it.
no
It's commonly accepted the word and works as a comma as well as a conjunctive. Because of this a comma is not needed.
No. There is no word or phrase in English that must follow a comma.
No, a comma does not go before the word 'in'.
The comma would go after.