YOU SAID:

I was at Walmart and this guy kept shoving beer down his pants

INTO JAPANESE

私はウォルマートにいて、この男はビールをズボンに押し続けた

BACK INTO ENGLISH

I was in Walmart and this guy kept pushing beer into pants

INTO JAPANESE

私はウォルマートにいて、この男はビールをズボンに押し続けました

BACK INTO ENGLISH

I was in Walmart and this guy kept pushing beer into pants