YOU SAID:

i went to the park last week and a zebra had escaped from the zoo

INTO JAPANESE

私は先週公園に行き、シマウマは動物園から逃げていました

BACK INTO ENGLISH

I went to the park last week and the zebra fled the zoo

INTO JAPANESE

私は先週公園に行き、シマウマは動物園から逃げました

BACK INTO ENGLISH

I went to the park last week and the zebra fled the zoo