Hi ANTON -- on Feb 18 2017 at 07:33, you wrote:

AS> Of course, but I once failed a test on a item  where
AS> inversion  was (supposed) mandatory.  It was similar
AS> to this:

AS>    Only at night do bats leave their caves...

AS> Does "only" really require inversion here?

It seems to me that "only" HAS to be next to "at
night". You might "invert" the sentence to say:

Bats leave their caves only at night

But that's a more clumsy way of saying it, to my mind!  I'll give you a pass mark!

Cheers... Dallas

--- timEd/386 1.10.y2k+