べい海兵 かいへい たいではありませんでした
be ikai heitaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 米海兵隊

1. Was not a U.S. Marine.; Was not a member of the U.S. Marine Corps.

Past/Perfective
Negative
Polite
Formal Register