A comma is placed before and (and all other coördinating conjunctions) when the conjunction is being used to combine two independent clauses. In the sentence "My name is Joey, and I am thirteen years old," a comma precedes the conjunction and to hold the two clauses together.
Do not put a space before a comma. Put one space afterthe comma.
No, you don't have to put a comma before at all.
Yes
no
Place the comma after the month and the day: August 15, 2012
The comma goes after.
Do not put a space before a comma. Put one space afterthe comma.
no. if but before is a sentence on its on and after but is a sentence on its own then put a comma before but.
before
You ussualy put a comma before the conjuction. On rare evernts you put the comma after.
No, you don't have to put a comma before at all.
no
no
Yes, you should put a comma before "as" when it is used as a conjunction in a sentence.
no
No.
The best guide is to put a comma when there is a short gap between the words when spoken.