Not necessarily.
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.
The comma should come before the word "but" when it is used to separate two independent clauses. For example: "I wanted to go to the store, but it started raining."
No, a comma does not always come before "for instance." It depends on the structure of the sentence. A comma is typically used before "for instance" when it introduces a non-essential or parenthetical element in the sentence.
Not at the beginning of a sentence. As you know is a clausal sentence adverbial, and as such it should generally be set off by punctuation. That would mean a comma after it at the beginning of a sentence, a comma in front of it at the end of a sentence and commas on both ends when it appears in the middle of a sentence: "He is, as you know, rather obstinate."
A comma usually comes before "which" when introducing a nonrestrictive clause in a sentence. If "which" is part of a restrictive clause, then a comma is typically not used.
Quotation marks typically go before or after commas, depending on whether the comma is part of the quoted material. If the comma is part of the quoted material, it goes inside the quotation marks. If the comma is not part of the quoted material, it goes outside the quotation marks.
Yes
Sometimes, but not always. There is no one single rule that applies to "but." ----
No, a comma does not always come before "for instance." It depends on the structure of the sentence. A comma is typically used before "for instance" when it introduces a non-essential or parenthetical element in the sentence.
No
It depends on the type of sentence. So your answer would be not all the time. I hope that helps! :)
A comma usually comes before "which" when introducing a nonrestrictive clause in a sentence. If "which" is part of a restrictive clause, then a comma is typically not used.
A period should come before the footnote at the end of a sentence, while a comma should not.
It could go either ways?
The comma typically comes before the conjunction "but" when it is used to connect two independent clauses. If "but" is used to connect two words or phrases within a single sentence, a comma is not necessary.
No, definitely not. In very many cases it would not even be optional. It would simply be wrong.
The correct order is "but ca-ma".
If a comma is needed, it normally comes after parenthesis.