No. There is no word in English that always requires a comma before it.
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.
A comma typically goes before "so" when it is used at the beginning of a sentence to indicate a reason or result. However, when "so" is used as a conjunction in the middle of a sentence, it does not usually need a comma before it.
Before EX: I need eggs, and butter.
not in all cases.
The general rule is that it doesn't need a comma before it. Example: I like apples as well as guavas.
you don't need comma
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.
yes
No, a comma is not always necessary before "which" in a sentence. Use a comma before "which" when introducing a nonessential clause, but do not use a comma before "which" when introducing an essential clause.
A comma typically comes before 'but' when it connects two independent clauses. However, if 'but' is used in a compound predicate, it usually does not need a comma before it.