YOU SAID:

i was walking in the muddy swap when i saw shrek

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シュレックを見たとき、泥だらけのスワップの中を歩いていた

BACK INTO ENGLISH

I was walking in a muddy swap when I saw Shrek

INTO JAPANESE

シュレックを見たとき、泥だらけのスワップを歩いていた

BACK INTO ENGLISH

I was walking through a muddy swap when I saw Shrek

INTO JAPANESE

シュレックを見たとき、泥だらけのスワップを歩いていました

BACK INTO ENGLISH

I was walking through a muddy swap when I saw Shrek