So why does I can't help wondering if it wasn't an accident nearly always means I can't help wondering if it was an accident?
Well, don't just sit there: tell me!
You mean you don't know either?
...it may be illogical, but I suppose we manage, on the whole.
Word To Use Today: was. It may seem a bit unreasonable that the past tense of is turns out to be was, but actually was is the one that's been most consistent. It comes from the Old English wesan, to be.