YOU SAID:
yesterday i ate a potato and ate a potato
INTO JAPANESE
昨日じゃがいもを食べてじゃがいもを食べました
BACK INTO ENGLISH
I ate potatoes yesterday and ate potatoes
INTO JAPANESE
昨日じゃがいもを食べて
BACK INTO ENGLISH
Eat potatoes yesterday
INTO JAPANESE
昨日じゃがいもを食べる
BACK INTO ENGLISH
Eat potatoes yesterday
Come on, you can do better than that.