"Tacia":
>> --------------
>> I write everything about work in my pink notebook; _____ it, I'd
[quoted text clipped - 4 lines]
>>
>> Someone thinks that "before it" is okay too.
James Hogg:
> ... "before it, I'd forget the things I should do" would be nonsense
> here,
I agree that (a) is wrong.
> and I find it hard to see how it could make sense in any context.
Well, if you put something like "today", "these days", or "nowadays"
on the front of the first sentence, you set up a contrast referring
to time.
Nowadays I write everything about work in my pink notebook;
before it, I'd forget the things I should do.
This is still not idiomatic English, but if I wouldn't be surprised if
someone with a foreign accent said it, and I'd understand "before" in
the sense intended. With a more expansive context:
Getting the pink notebook started a new period in my life.
In my life with the notebook, I've written everything about
my work in it; before it, I'd forget the things I should do.
> It would have to be expanded and modified to something like "Before
> I had it [my notebook], I'd forget [= I tended to forget] the things
> I had to do."
Yes, that works, and it's certainly a more likely expansion than my
examples.

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Mark Brader | "Forgive me if I misunderstood myself, but
Toronto | I don't think I was arguing in favour of that..."
msb@vex.net | -- Geoff Butler
My text in this article is in the public domain.