YOU SAID:

Once I was a one year old, but I am older now

INTO JAPANESE

かつて私は1歳でしたが、今はもう年上です

BACK INTO ENGLISH

I used to be one year old, but now I am older

INTO JAPANESE

以前は1歳でしたが、今は年上です

BACK INTO ENGLISH

I used to be one year old, but now I am older