Colin Firth confuses again The other day I was watching Nanny McPhee and was baffled by a grammatical form used by the character of Colin Firth. Namely, referring to the nanny's wart that seemed to have disapeared he said: - Didn't you used to have two of those? it was strange to see negation in the past tense + "used to" in its past form. I tried to delve into forums but it seems like it's colloquial although not entirely correct. Disclaimer: not to blame Colin Firth :) I was watching with subs and so was it in them. Unfortunately, since "use to" and "used to" are pronounced almost identically I can't make it out myself whether he says correctly :(