Breakdown of J'ai complètement oublié ton nom.
le nom
the last name / the name
ton
your (informal)
oublier
to forget
complètement
totally, entirely
Questions & Answers about J'ai complètement oublié ton nom.
Why is complètement placed between ai and oublié?
In French, adverbs of degree and quantity (like complètement, beaucoup, or vraiment) usually go between the conjugated auxiliary verb (ai) and the past participle (oublié) in compound tenses. You cannot put it at the end of the sentence like you might in English.
The current lesson is about invariable adjectives acting as adverbs. Does complètement fit into that category?
I thought nom meant "last name" and prénom meant "first name". Why use nom here?
You are right that strictly speaking, un prénom is a first name and un nom (or un nom de famille) is a last name. However, in everyday spoken French, nom is frequently used as a general term for "name" (referring to the first name, or the person's identity in general), exactly as it is used in English.
Could I use the imparfait and say J'oubliais ton nom instead?