じいさんじゃありませんでした
爺さんじゃありませんでした
jiisanjārimasendeshita

Noun
Desu Copula

The polite, past negative form of じいさん

1. Was not a grandfather.; Was not an old man.; Was not sir/mister.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana