縦断 じゅうだん てき研究 けんきゅうではありませんでした
jūdanteki kenkyūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 縦断的研究

1. Was not a longitudinal study.; Was not a cross-sectional study.

Past/Perfective
Negative
Polite
Formal Register