YOU SAID:

As I'm pacing the pews in a church corridor

INTO JAPANESE

私は教会の廊下で席をペースで歩きながら

BACK INTO ENGLISH

I was walking at the pace at the church corridor

INTO JAPANESE

私は教会の廊下を歩いていた

BACK INTO ENGLISH

I was walking in the corridor of the church

INTO JAPANESE

私は教会の廊下を歩いていました

BACK INTO ENGLISH

I was walking in the corridor of the church