YOU SAID:

big cars used to be small cars use to be toy cars

INTO JAPANESE

大きな車は小さな車でしたがおもちゃの車でした

BACK INTO ENGLISH

The big car was a small car but a toy car

INTO JAPANESE

大きな車は小さな車でしたがおもちゃの車でした

BACK INTO ENGLISH

The big car was a small car but a toy car