YOU SAID:

I am dumb just like my mother was when she was in her twenties

INTO JAPANESE

私は、母が２ ０代のときのように愚かだ

BACK INTO ENGLISH

I'm as stupid as my mother was in her twenties.

INTO JAPANESE

私は母が２ ０代だったのと同じくらい愚かだ。

BACK INTO ENGLISH

I am as stupid as my mother was in her twenties.

INTO JAPANESE

私は母が２ ０代だったのと同じくらい愚かだ。

BACK INTO ENGLISH

I am as stupid as my mother was in her twenties.