YOU SAID:

I ain't ever seen two pretty best friends, always one of them has to be ugly.

INTO JAPANESE

私は2人のかなり親友を見たことがありません、常にそのうちの1人は醜い必要があります。

BACK INTO ENGLISH

I haven't seen two pretty best friends, one of them should always be ugly.

INTO JAPANESE

私は2人のかなり親友を見たことがありません、そのうちの1人はいつも醜いはずです。

BACK INTO ENGLISH

I haven't seen two pretty best friends, one of which should always be ugly.

INTO JAPANESE

私は2人のかなり親友を見たことがありません。そのうちの1人はいつも醜いはずです。

BACK INTO ENGLISH

I have never seen two pretty best friends. One of them should always be ugly.

INTO JAPANESE

私は2人のかなりの親友を見たことがありません。それらの1つは常に醜いはずです。

BACK INTO ENGLISH

I have never seen two pretty best friends. One of them should always be ugly.