YOU SAID:

I washed my cat yesterday

INTO JAPANESE

私は昨日猫を洗った

BACK INTO ENGLISH

I washed the cat yesterday.

INTO JAPANESE

私は昨日猫を洗った。

BACK INTO ENGLISH

I washed the cats yesterday.

INTO JAPANESE

私は昨日猫を洗った。

BACK INTO ENGLISH

I washed the cats yesterday.