Ardith Hinton to Anton Shepelev:

Nah. Just a few ordinary household items made of xxx,
yyy, and zzz... none with magic(k)al powers, but all
of which we are still using. :-)

Then I won't pursue this quotidian matter any futher.
But may I make so bold as to question the grammar in
the quoted sentence?

Of course. You may be sure that whatever I say in the
E_T echo has been edited & proofread thoroughly; however, I do
miss things sometimes. :-)

Thank you for this most commendable commission to quality in the
echo.

1. Is it correct to use "but.. which" without a prior
occurence of "which" in the sentence?

If I hadn't thought so, I wouldn't have done it.
Perhaps it is an error... or perhaps it's one of those stunts one
shouldn't try at home. :-))

It may be that...

I could have written "... none of which has [blah
blah] but all of which we are still using." Although it would
have made a nicer parallelism I felt it might be unnecessarily
wordy.

Indeed. The amendment I had in mind (but withheld) was the
following: "none with magic(k)al powers, but all of them still in
use".

My other misdoublt about it (withheld, too) was that "but" does not
seem to introduce any kind of contradtion! On the other hand,
magical items, being rarer, are likely to be used longer.

IIRC I've seen a few constructions like "... most, but
by no means all, of which [i.e. covid-related deaths in this
country] are associated with long term care facilities". In such
cases the logic is more obvious.... :-)

A perfectly reasonable construction to me, too.

2. Is it correct to express the continued use of these
items in the present progressive tense?

As a native speaker I depend heavily on my Russian
modem buddies & foreign language textbooks to identify the names
of verb tenses.

I think the terminology is largely the same in English Grammars
written in English, by the English, and for the English.

(English \Eng"lish\, n. Collectively, the people of England;
English people or persons.)

In general the present tense would work too, but in
this example I figure it would change the emphasis as well as the
rhythm I had in mind. :-)

If I grasp this distinction corretly, then I should say that a busy
and professional photographer may say: "I am using a Horizon
camera," whereas a time-to-time amateur like me who shoots several
film rolls a season may say: "I use a Horizon camera"?

That the sound of your original version is better is "fixed with the
golden nails to the walls of inevitable necessity".

In a moment, his wife looked up at him and said, "I'm
sorry. I'd not thought she was capable of a thing like
that."

Mark the last sentece, which, again, is uttered by an
apparently educted person.

It strikes me as unusual, but not incorrect. If the
person you're referring to lives in the Southern States I'd cut
her a bit of slack.... :-)

And she sure does.

How about this:

a. I forgot he was vegetarian. (he still is)

That's what I'd probably say.

b. I forgot he had been vegetarian. (he has reverted)

If I knew he'd reverted but my brain slipped a cog, I
might say "I forgot he'd been vegetarian as an impecunious
student but modified his stance after he began doing hard
physical work in the construction industry.... :-)

Your extrapolation has given new life to my example, but I see no
cogs slipping...

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