よん次元 じげん ちょう立方 りっぽう たいじゃなかったです
yonji genchōrippōtaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 四次元超立方体

1. Wasn't a four-dimensional hypercube.

Past/Perfective
Negative
Polite
Casual Register