YOU SAID:
I took a walk to the park and had a picnic.
INTO JAPANESE
公園まで散歩してピクニックをしました。
BACK INTO ENGLISH
We took a walk to the park and had a picnic.
INTO JAPANESE
私たちは公園まで散歩してピクニックをしました。
BACK INTO ENGLISH
We took a walk to the park and had a picnic.
That didn't even make that much sense in English.