YOU SAID:

I was walking down by the beach and I saw a great big tuna

INTO JAPANESE

ビーチを歩いていたし、私は偉大な大きなマグロを見た

BACK INTO ENGLISH

Was walking down the beach and I saw a great big tuna

INTO JAPANESE

ビーチを歩いていたし、私は偉大な大きなマグロを見た

BACK INTO ENGLISH

Was walking down the beach and I saw a great big tuna