I have a question about mood
Note that the following sentences are same :
If I did not have money, I could not buy it
=I could not buy it without money
=If it were not for money, I could not buy it
=Since I have money, I can buy it.
I want to know forming of the expression : If it were not for (A)
I guess that this is shortened from some long clauses. Consider the following :
I have only one cat and it is from Korea =I have a cat, which is from Korea.
Usually we use second sentence. But it can be viewed as shortened form of first sentence. That is, about (A) I want to know the forming. Translation is nonsense. Especially we cannot translate "it" If we write the sentence into complete sentence in detail, what is it ?
Thank you in anticipation.