I just have a quick question about joining a sentence with therefore.
My car just ran out of gas therefore I need to call a cab.
Note: I am aware that there are no commas.
Ok so do I need to place a comma before or after the therefore? Or both? I am aware of the mechanics of the use of the itroductory parts of a sentence, just like in this sentence, but I am not sure whether the therefore word is apart of the introduction of the sentence or the ending part.