牌姿 はいしじゃなかったです
haishijanakattadesu

Noun
Desu Copula

The polite, past negative form of 牌姿

1. Wasn't good at [something]; Didn't have a good skill at [something]; Wasn't skilled at [something]

Past/Perfective
Negative
Polite
Casual Register
Mahjong