YOU SAID:
One time I saw Jack eat a sandwich
INTO JAPANESE
サンドイッチを食べるジャックを見た 1 回
BACK INTO ENGLISH
Once saw a sandwich to eat Jack
INTO JAPANESE
ジャックを食べるサンドイッチは一度見た
BACK INTO ENGLISH
Once saw Jack eat sandwiches
INTO JAPANESE
サンドイッチを食べるジャックを見たら
BACK INTO ENGLISH
I saw the sandwich to eat Jack
INTO JAPANESE
私はジャックを食べるサンドイッチを見た
BACK INTO ENGLISH
I saw the sandwich to eat Jack
That didn't even make that much sense in English.