Yes
Yes, if it joins two independent clauses, or joins items in a list. If it does not, then it is not always needed. For instance, "I like apples and oranges." The and (a conjunction), does not need a comma before it in this case.
no
Yes! They should!
no
No comma needed.
NO. You replace the comma with "of"... For instance, July of 2009
Yes, if it joins two independent clauses, or joins items in a list. If it does not, then it is not always needed. For instance, "I like apples and oranges." The and (a conjunction), does not need a comma before it in this case.
No.
no
Yes! They should!
No.
no
No comma needed.
No. There is no word or phrase in English that must follow a comma.
Unlikely, but depends on context.
It depends.For example, in the sentence:She asked if she could go too.There is no comma. But, In the sentence:She asked, "Can I go?"There is a comma.
You should put a comma before a person name if you're talking directly to them. ex- Please come here,Lily.