YOU SAID:

Two cows ate grass in a field yesterday

INTO JAPANESE

昨日2頭の牛が畑で草を食べました

BACK INTO ENGLISH

Yesterday two cows ate grass in the field.

INTO JAPANESE

昨日、2頭の牛が畑で草を食べました。

BACK INTO ENGLISH

Yesterday, two cows ate grass in the field.

INTO JAPANESE

昨日、2頭の牛が畑で草を食べました。

BACK INTO ENGLISH

Yesterday, two cows ate grass in the field.