No. I comma is inserted in the middle of a sentence, statement, a statement that lists several items, or identifying portion of a statement. Where a comma is inserted depends in most cases on the tense of the sentence and whether or not that person needs to pause. Therefore, the word "which" does not always have to have a comma. Please always look at the context of what is being stated and the way it is being expressed. This way you will know whether or not to put a comma. Also put a comma before and after a proper name identified in the middle of a sentence. (example: The supervisor, Bill, will handle it from here).
yes, which is used in non restrictive clauses (sentences with unnecessary info). you don't use a comma before that because it is used in restrictive sentences.
ex: I ate your cookie, which was made with Chocolate Chips, sorry. (non rest.)
vs.
ex: I ate your cookie that was made with chocolate chips, sorry. (restrict)
the difference between the two is:
- in the first ex, it can be assumed that there is only one cookie, the speaker merely describes it.
- in the second, it can be assumed that there are many cookie and the reason it is described is to clarify which one of the cookies.
No. There is no word in English that always requires a comma before it.
A comma is typically used before "but" when it connects two independent clauses. However, if "but" is joining phrases within a single sentence, a comma is not necessary.
In general, you do not need a comma before a preposition unless it is part of a larger phrase that requires punctuation. However, always defer to the specific rules of grammar or style guide you are following.
It is usually not necessary.
Typically, there is no need for a comma before the word "as." However, using one is not technically wrong, just superfluous.
Before EX: I need eggs, and butter.
not in all cases.
you don't need comma
The general rule is that it doesn't need a comma before it. Example: I like apples as well as guavas.
yes
Yes.
last comma before the and is not necessary