Here's a grammar question I discussed with someone tonight:

'(...) who estimate my intelligence [to be] so shabby as that.'

Except the 'to be' part was omitted, like in the double accusative syntax. I believed the shorter version to be correct, while my interlocutor insisted that 'to be' was necessary when introducing a comparison ('so ... as'). I agree that 'estimate' wasn't a good choice of verb, but we didn't argue that point, only the viability of the shorter syntax without 'to be' in it.

My contention is that the longer version with 'to be' is basically accusative with infinitive (what Latin calls the ACI), while the short one without is basically double accusative (what Latin calls the accusativus duplex and also workable, even though odd to a modern earn and hard to recognise as correct (and perhaps a Latin interference best avoided, but still correct English).

For ease of use, let's modify the example and use 'think' instead of 'estimate':

'(...) who think my intelligence so shabby as that.'

Thank you.